Oh, um, in Provincetown, don't miss the pool at the Boatslip. They host a hot tea dance. (Ask a clerk about the "local nightlife".

)
More seriously, there's the Zebra Lounge, which is good - kind of New Wave-y, black light, high contrast ("zebra-like"?) patterns, friendly bartenders, good view of Provincetown's Castro Street, known as Commercial Street.
Purgatory, which is a nice big space but empty when I went. (Maybe they all knew I was coming.)
There is the Paramount for dancing, and a pool out back which they share with a music video bar next door.