You pulled up to Slippery Slope but the line is too damn long and you don’t want to wait. The veteran move is to walk across the street and peer into the side alley and see if the line at East Room is any better. Odds are probably not, but that’s only because the scene here is just as fun. It’s a grungy but still cool scene inside, and the name of the game is cheap beer, liquor, and a large open space for everyone to dance.