When the scores start to come in, someone has to call out which country they think will get 12 points from the current one; if correct, everyone including the caller takes a shot.
Should you wish to get the drinking started during the songs themselves, we have devised a foolproof selection for you to try.
Drink whenever there is a key/tempo change
Drink whenever there is a use of pyrotechnics/wind machine
Drink whenever there is someone on stage of questionable gender.
Alternate rules from Finnish magazine City:
Whenever a song contains more than one language, take a sip.
If one of those languages is pronounced badly by the singer, take another sip for every badly pronounced language.
Whenever a song is about world peace or friendship that unites nations, take a sip. (f.ex. Israel's There Must Be Another Way from 2009, Georgia's Peace Will Come from 2008.)
If the song panders to the gay audience, take a sip.
If the song could end up in a drag queen's performance repertoire, take another sip. (Sweden's Invincible from 2006.)
If the song is a joke or a "protest", take a sip.
If you're not sure, take a sip anyway.
If the song is a copy of last year's winning song, take a sip.
If the song resembles ABBA, take an additional sip.
If the song's title does not have actual words in it, take a sip. (Sweden's Diggi-loo, Diggi-ley from 1984, the Netherlands' Ding dinge dong from 1975.)
If the performer changes outfits during the performance, take a sip. (Things like tearing away part of a dress or growing wings like Lordi in 2006 count.)
If the last chorus goes up a key, take a sip.
If the performer has a mustache or manly stubble, take a sip.
Take an additional sip if said performer is a woman.
If the dancers are in national costume, take a sip.
If the performance resembles a tourism ad, take an additional sip. (Moldova's "Hora Din Moldova from 2009.)
If the song contains an "ethnic" instrument, take a sip. Accordion and pan flute count as ethnic instruments.
If the performance contains excessive amounts of wind machine use, take a sip. (Sweden's Invincible and Albania's Zemren E Lame Peng from 2006, Azerbaijan's Always and Croatia's Lijepa Tena from 2009.)
If the female singer's eyebrows are noticeably darker than her hair, take a sip.
If the singer has whitened teeth, take a sip.
Whenever the hosts have changed outfits between performances, take a sip.
If Ireland performs a ballad, take a sip.
If Malta performs a power ballad, take a sip. (The One That I Love from 1998, Angel from 2005, What If We from 2009.)
If a song from a country that was formerly part of Yugoslavia is melancholy, take a sip.
If a song from a country in the Balkans contains the word "Balkan", take a sip. (Macedonia's Mojot Svet from 2007, Romania's The Balkan Girls from 2009, Serbia's Ovo Je Balkan from 2010.)
If a Greek male performer or dancer shows off large amounts of pectoral muscle, take a sip. (Shake It from 2004, My Number One from 2005, This Is Our Night from 2009, Opa! from 2010...)
If said Greek performer or dancer has massive chest hair, take another sip.
If a country gives another country 12 points for geographical or political reasons, take a sip.