I've just remembered another great time, must have been before I joined UKP.
There used to be a number of houses, Selly Oak ish, with weekly changing Thais one per house. £50hh, saw loads of them, nearly all good. Looking back, I just hope they weren't trafficked although I never got any hint of reluctance nor felt uneasy. I didn't really know about such possibilities then. Just seems cheap in retrospect.