In the web-published novel series Shadow of the Templar, team leader Simon is a complete addict, to the point where he took to kissing someone who'd just taken a sip of coffee when, post-surgery, he was banned from the drink, leading to lines like "Oh God, you taste like coffee". The coffee maker in the team's headquarters is named "Mrs. Simon Drake (<3)".
Deliberately subverted in this podcast where the hosts open every show with "Morning Coffee". To date they have never once had coffee during this segment, with beverages sometimes deeply oddball to avoid it. Also some of the co-hosts do a segment dubbed "Evening Pint" where they drink nothing but coffee.
In the devisor labs at Whateley Academy, the mad scientists gather every morning over a specially designed brewer to enjoy coffee so strong it's... well, just read the quote.
"Imagine a twenty-gallon stainless-steel vat of water, heated by a kind of micro-fusion reactor and made to work as a giant engine of percolation. Add to this the whole deal a filter that literally rips every useful bit of anti-nutrient and caffeine in the grounds and you have yourself some potent stuff. Our coffee is considered a deadly weapon in three states."
Jericho, one of said devisers, is so addicted to coffee that he has a coffee mug holder. On his power armor.
The devisers have a regular coffee chant that's a blatant Shout-Out to the Mentats of Dune.
Murphy uses coffee to keep her ADHD under control. It works to a certain extent, but she usually ends up getting her coffee taken away because she's so high on caffeine that she's a jittery, giggling mess.