The strip club where a kobold dancer named Tart worked before being demoted to the bargain rack lineup.
Invoked when the party mocked the Reaver adjutant Tart. Splash Zone recalled they once did have a dancer named Tart at Bitches; Doctor Bones remembered her as an interesting lass. Dong Quixote filled in the rest: after Tuesday-Two-For-One broke her jaw in a fight, Tart was moved down to the club's bargain rack lineup, couldn't get along with the madam there, and became a mercenary, after which nobody saw her again.
The same thing, Dong noted, happened to his beloved Corcunda.
The club at the center of the party's running Tart joke.