There's always Sinplicity in Elm Park.
External Link/Members OnlyForget advert, they are not open 24/7, but many drunken stumbles to this secluded door tucked away down a driveway opposite where the petrol station used to be in Elm Park (Old skool)
Burley bouncer let's you in, offers you a drink, tiny rooms, but girls are VERY accommodating. Friendly, chatty, even willing to negotiate on price. Friday evenings, an extremely dominant girl used to work there, fantastic times!
I can't be more precise as I've generally been half-cut upon visits, but I know they have a large range of anal toys if that's your thing (it is mine)
I'm not even sure they are still open as of 2017, but I'm pretty sure they are and if the attached advert and phone number are no good, google it.