Salon du Masque

From Introduction:

For the last two years, the Salon du Masque has been all the rage in the Merchant District. Founded by a mysterious countess from a distant land, the Salon has quickly become a fixture on the social scene of Freeport’s elite.

The Salon is open in the evening on Friday, Saturday, and Sunday. It is an elegant place, with a garden, numerous balconies, and over a dozen exquisitely furnished rooms that offer varying degrees of privacy. The staff stands ready to cater to every whim or fade into the background as required. There are only two rules of the house: You must pay 100 gp to enter and you must wear a mask at all times. Everything else is permissible.