I haven't been there, but London's Hospital Club is high on the list of the places I plan to visit on my next trip to London.
From the website pictures and information, It looks like a combination of a traditional London social club and a coworking facility for creative professionals.
They describe themselves as "the only club designed specifically for the creative industries" and their role is to "to discover and feed the best creative talent, and produce, publish and celebrate their work."
In addition to the standard club amenities - bar, food, cozy chairs, etc. - they also provide shared video and music studio space.
The Hospital Club also illustrates the growing diversity of shared work spaces.
Check out their website - it is very cool.