Room for an acting workshop

I need to book a room on the 6th of October from 6:30pm to 9:30Pm.

I need a room for an acting workshop,
The space should be able to contain 14 actors.
We need 14 chairs and possibly some furniture to use to recreate a living room (table, sofa, random objects, books). But this is not necessary as long as we have the chairs.

The location should be in London and close enough a tube station. Central London ideally but also places like Wimbledon which are easy to reach with the underground.