My drinkin buddies get together once or twice a week to get super drunk and play Halo 2 and Halo 3.. the best part about it is talkin smack, and drunk driving the warthog.
We've been doing it for so long, we play Better drunk vs sober.. I highly recommend it.
Back in Halo 1, we just did, take a drink every check point.. after a few levels on legandary, you're smashed.