I was gonna suggest Fetlife as well but that is a good point of it being more of a forum. However they do have groups created for people looking to date and meet up!
It is probably the best way to go for everything all around!
Remember collarme.com? I think collarspace sprouted from that site. Anyway, I was watching the ID channel on TV. For those that don't know 'Investigation Discovery.' Ever wonder how many murders happen in this country? Well....enough to fill up a TV station. 24/7. I was watching a show and the site name popped up on one of their shows with a murder involved. That sucks. I liked that site also. It's more difficult when you don't live in a larger size City. Also, whatever site you may like, be careful of the scams.
Fetlife is best but you have to join the groups and discussions for your fetish then chat t people or start your discussions. Fetlife is also good for munchies (a gathering in a public place, usually a pub for people to meet, they are casual dress code and plenty around the UK)