Lisa Koch and Peggy Platt, aka Dos Fallopia, throw out zingers like lounge-circuit pros and manically break into songs about Seattle, including a number dedicated to our city’s crappy transit system and the deep-bore tunnel. Before the shtick gets old, a new sketch begins. The tone they set is fun. The mood is joyous, energetic, and 100 percent ham, and the result is overwhelming in the best way. Physical gags—like “adventures in anti-aging with Nancy Reagan”—are layered with wordplay, one-liners, and genuinely great musical numbers. As far as holiday shows go, this one is tops. (Theater Off Jackson, 409 Seventh Ave S,, 7:30 pm, $17–$30, through Dec 30)