(NIGHTLIFE) Recent entertainment at Can Can has included old-time string band the Tallboys (with a percussion section of a winsome young lady tap-dancing on a tiny plank floor) and the retro-apocryphal sounds of the Bad Things (featuring a surly dwarf beating a tambourine, drinking a beer, and intoning prose poetry). Tonight, the in-house dancers (bosomy, wearing frilly underwear) perform during the dinner hour; later, the Heavenly Spies ("espionage-à-trois" burlesque) take the stage. (Can Can, 94 Pike St, 652-0832. Free/all-ages before 10 pm, $10 after in show room, bar is free.)