BM's review refers to a "flat", which presumably they all work from then.
That makes me wonder whether it would be possible to treat the place as a parlour, and just walk up and ask for line-up? Or, if there's a need to book a specific girl, might it be OK to ask to meet the other girls afterwards and choose one for round 2 (provided I'm in an energetic mood ha)? Curious to hear from BM or others whether they've done either of these things...