I have visited Rios spa in London and wondered if there was anything like that in the Northwest? Any suggestions to while away an evening appreciated.
There's a whole load of swingers clubs in and around Manchester. Have a look at the "Clubs" tab on the left and you can see ratings, reviews and links to the individual club websites.
My personal favourite is Cupids in Swinton. Been going there for 15 years. It has a sauna and a 4-person jacuzzi. But if you want more of the "wet area" spa experience, Partners in Bury (just to the North of Manchester) gets great reviews for its wet facilities.
Hope that helps?