"Cheezeborger, Cheezeborger -- No Coke . . . Pepsi." Viewers of the original Saturday Night Live will certainly remember the classic John Belushi routine, a moment in the life of a crabby Greek short-order cook. The comic got his material from the Billy Goat Tavern, located under North Michigan Avenue near the bridge that crosses to the Loop (you'll find it by walking down the steps across the street from the Chicago Tribune building). Just BUTT IN ANYTIME says the sign on the red door. The tavern is a classic dive: dark, seedy, and no-frills. But unlike the Saturday Night Live skit, the guys behind the counter are friendly ("Double cheezeborger is the best!" one shouted out cheerfully to me when I couldn't make up my mind what to order recently). The Billy Goat is a hangout for the newspaper workers and writers who occupy the nearby Tribune Tower and Sun-Times Building, so you might overhear the latest media buzz. After work, this is a good place to watch a game, chitchat at the bar, and down a few beers.