Damn, you guys are caffeine freaks!
The most I ever had was... a nice grande-size hot mocha from Starbucks in the morning. Then a nice warm cup of double-shot hazelnut cappucino at a nearby cafe to keep me going. Then another cup of normal coffee.
Afterwards I went to a cafe (to meet up my friends) and had a huge cup of black-forrest coffee (with alcohol). Holy crap, I was kicking balls.