The House of Chimes
From The Fifth City Wiki
"I've heard tell that there's a fancy club for exceptional sorts. It's on the river, in the shell of some old clock tower. The things that go on there! They'd curl your hair and clench your toes."
The House of Chimes is an exclusive club run by the Masters, with an exorbitant monthly fee. It is housed in what was formerly known as Big Ben.