A friendly Scary Black Man chained next to the hero, who will die heroically for the hero's freedom
The alternative, for a male slave, to Gladiator Games.
In reality galley slaves were uncommon in the ancient world. Most rowers were free men from the lower classes. In the case of Athens, said people would often push for war to serve as rowers as they got a better wage rowing at sea than tilling the fields or working a low paying job. Using slaves as rowers was to be avoided. If a ship full of free rowers was boarded, they would fight alongside the marines and other personnel. If a ship full of slave rowers was boarded, the boarders would say "Hey, you know those Jerks who beat you and force you to row, we are going to kill them! We would be much obliged if you helped us with this and would give you your freedom!" This is one of the reasons why the Ottomans lost the battle of Lepanto as many of their ships had galley slaves.
In Astérix At The Olympic Games, the gauls hire a ship to transport them to Rome only to find the ship they hired is a galley, where they're expected to do the rowing. The ship's captain explains that these are the "deck games and sport" promised. He then confirms that it's usually a slave ship: "You got the better deal, normally rowers are chained and whipped!"
Similarly, the Phoenician merchant who shows up from time to time uses "business associates who didn't read the contract very well".
And in Asterix the Legionary, the troop Asterix and Obelix signed up in are the rowers (see the Real Life section below). The voyage ends up quite pleasant, driving the captain nuts by countering his orders (heading straight for the pirate ship, for instance).
And in another story, the drummer thing is subverted when the pirates end up in command of a Roman galley, they ask their Scary Black Man to be the drummer, at which point he pulls off a high-speed drum solo before being replaced with a standard drummer.
The Thorgal volume "The Black Galley": Thorgal gets captured and becomes one of these. There's the drummer (who's a Scary Black Man) and the whip-man.
Also, due to the Running Gag of referring to every ship as a galley, we get this exchange, as Don Lope and Armand have snuck onto the ship:
Don Lope:: Ola, amigos! We are Christians, like you! We've come to rescue you from the Barbary scum! Armand: Once again, Don Lope, this is not a galley, but a zebec. A zebec is a sailboat... Don Lope: So these people in the hold are not galley slaves? Armand: No! Don Lope: But Turkish sailors? Sailors: YES!
In Les Misérables, the main character is referred to as a galley slave ("bagnard"), as was typical at the time, even though by that point the prisoners were no longer allowed to serve as actual galley slaves. However some translations seem to be slightly confused by this and have Valjean as an actual galley slave, as do some of the films. Valjean and those like him were more like enslaved dock workers/manual laborers.
Uhtred, the Anti-Hero of Bernard Cornwell's Saxon Chronicles, spends some time as an oar-slave. Instead of the traditional Scary Black Man friend, he instead finds himself a crazy badass Irishman. They keep each other angry enough to survive.
in " the Golden Crown, by Chris Hiemerdinger, the time traveling Harry Hawkins is sold as a slave to Romans and finds himself on a ship heading who-knows-where. lucky for him, pirates burn down the ship( after he grabs the key, and unlocks all the other rowers.)
Happens in "The Legend of Luke", one of the Redwall novels.
In the World of Gor, one of the few roles a male slave could live and die in. Captain Bosk made it a practice to free slaves of captured vessels, which made them more motivated rowers, and fighters when necessary, out of gratitude and aversion to re-enslavement.
Played with in Shogun. When Blackthorne sees the galley that will transport him to the capital, he panics thinking its a slave ship and is willing to die in order not to be a galley slave. It is revealed that the rowers were all full samurai doing their duty rather than slaves.
In The Long Ships, protagonist Orm and his companions are captured in Spain while on a viking trip, and spend two years as galley slaves.
Master of Whitestorm begins with the titular character and his slaves working the same oar of a Mhurgai ship.
Seen in every Redwall book involving pirates in any major capacity. More often than not the heroes will end up killing the ship's crew and freeing the slaves.
Not all Redwall books, actually. Legend of Luke, Mariel of Redwall, and Mossflower incorporated oarslaves for the pirates. Some of the baddies, even pirates, in later books held slaves, but did not use them on the ships.
In The Sea Hawk, this happens to the hero when he is betrayed by his younger brother. He later returns the favor to said betrayer.
The Mystery of Atlantis: the hero can end up as a galley slave at one point. Being a time-traveller, he simply time travels out of there while everyone are hanging their heads down out of fatigue.
In the early Doctor Who serial The Romans, the heroes are separated while visiting Nero's Rome, and Ian ends up enslaved and working a galley.
In Frankie Howerd's Up Pompeii, the main character has a Have We Met?? moment with another slave. He doesn't recognize the other guy at first, and the other guy only realizes when he sees the back of his head. He sat behind him in the galley, so that's all he saw of him for all those years, but he would recognize the back of that bonce anywhere after that.
Parodied in a The Far Side cartoon. The sailors are wondering why their ship is going around in circles all the time...which the reader can see is because they put all the big, muscular slaves on one side of the boat, with the other side being crewed entirely by skinny wimps.
Another featured a galley slave complaining to the whipmaster about getting jabbed with a splinter.
One of the "bad endings" of the Tunnels & Trolls solo adventure City of Terror, has your character end up as galley slave. "You learn to enjoy your life as a galley slave, it's not bad.. But it is HELL, when the captain wants to water-ski."
Downplayed in Golden Sun. Monsters attack the ship Isaac and his friends are on, and by the time you fight each wave off, one of the (voluntarily employed) rowers has been put out of commission. After each round, you have to pick one of the NPC passengers to press-gang into service as a replacement for the rest of the voyage, whether they like it or not. Choosing the right combination of replacements will actually unbalance the rowers, sending the ship off-course and getting you early access to the Bonus Dungeon.
Subverted: Actually far less common (though not unknown) in the Sword And Sandal era. Slave galleys were a staple of Renaissance naval warfare when it became normal to put several men on an oar. In Ancient and Medieval times freemen were preferred because rowing one man to an oar required more skill.
The Roman Army'sNaval Service only wanted free men, who were paid well, well trained, and highly motivated by the chance of citizenship at the end of their tenure. Since ramming and boarding actions were a staple of ancient sea combat, you'd need fast ships crewed by professionals willing to do their best. As a further reason, if the ship was boarded, a crew of angry and armed free men rowers was a far better second line of defense than chained, unhappy slaves.
Being a Galley Rower was also a prestigious Athenian Navy position, for similar reasons as their Roman counterparts. It is true that the rowers were thetes—the lower class of Athenian citizennote Athens had four classes of citizen: Thetes, the working classes; zeugitae, the middle classes who had enough wealth to purchase their own armor and weapons; hippeis, or "knights", meaning people rich enough to maintain a horse and served as cavalry; and "five hundred bushel men", whose income of 500 bushels of grain (or equivalent) per year made them impossibly wealthy. While the Constitution of Solon originally included some political and legal inequalities, these were mostly eliminated in the time of Pericles.—this was purely economic; the thetes were the most numerous citizens, as well as the only ones who couldn't afford the weapons needed to fight on land.note With few exceptions, the soldiers in the armies of Greek city-states paid for their own equipment, while the state would pay for provisions while on campaign. Athens recognized the importance of its navy to its defense (calling them, famously, the "wooden walls") and later their importance to the Athenian Empire, and honored the rowers accordingly. The thetes also tended to be most favorable towards going to war, because being a galley rower was a better-paying and much more prestigious job than was available to them in peacetime.
Carthaginian Navy rowers had living and training requirements similar to a modern athlete. No wonder their Navy was so feared in the Mediterranean.
Played straight in the Renaissance when the chief tactic was to mount as many cannon (no more than five) as could be fitted onto the bow, gain a positional advantage, and sweep the opposing deck with shot before boarding. This required less delicacy than ramming and the rowing methods of the time meant that the chief desire was having more reserves.