There’s a great venue to the West of London, just off the A 316, the M3 and M25, easily reached from London, Middlesex and Surrey. It’s called the Hellfire Club and it’s home to various alt sex events, from swinger nights to BMFC parties, etc. Hellfire is not well enough known in the BDSM world, though – it’s pretty much a hidden treasure

See the article here:
Swish – West London’s Friendly Fetish Night