At UCB Theatre, Harold Night pairs two New York house teams, Club Gator and SNAIL!, in the long-form Harold, a format that has shaped the city’s improv scene since UCB’s rise from downtown experiment to institution. Club Gator tends toward tight ensemble logic and controlled escalation. SNAIL! leans on legible character choices and repeating structures that let scenes accumulate meaning. Seen together, the evening functions like a lab report on how different group habits produce different kinds of comedy.