Beer is an important part of every college student's life. See also beer pong.
It used to be illegal to sell any alcohol in the town of Oberlin (and you still can't buy hard liquor in a bottle -- this is why Johnny's is outside the city limits and why the city limits were redrawn around Presti's to allow them to serve wine). One of the earlier relaxations of this law was to allow the sale of the dreaded "3-2 beer", a watery concoction with 3.2% alcohol. Older alumni will often (if asked nicely) relate horror stories about how much of the stuff it took to get even a moderate buzz and the attendant bladder dilation and overall frustration that made getting drunk in the 3-2 era such a royal pain.
The Feve has the following on tap: Guinness, Newcastle, Dos Equis, Sierra Nevada Pale Ale (that's the green one), Strongbow Cider, Magic Hat #9, Blue Moon, and a seasonal brew from Cleveland's Great Lakes Brewery. Anything on tap can also be taken home in a growler, which is a big glass bottle with the Feve's Black Label logo etched on it! They're $15 for a full one, but they're reusable so bring in empties and get a refill for $8 (or maybe it's $7?).
Johnny's has a very wide range of beers at decent prices. Next time you're bored, swing by and pick up something you haven't tried. (Low on cash, and like dark beer? Try Yinpu, a dark rice beer from China that's $3 for a six-pack.) Having a party? You can get 30-racks of PBR for something like $12 or $13.
Gibson's is easier to get to from campus and has a decent selection of beers. Pretty much everything you can find at Gibson's you can find at Johnny's for a couple dollars cheaper.
It is possible to get a Keg near Oberlin.