This bar in the Hotel Grosvenor House is well frequented, especially on Tuesdays’ Ladies Night. The two-level lounge with a view of the skyline is spacious and includes several bars and a club with a dance floor. On Tuesdays, the idea is simple: Before 10 pm, ladies receive three vouchers, which can be used for either free beverages or food. For only four vouchers, you can get a free bottle of wine—so we recommend pooling with a girlfriend and toasting your friend.