The vast majority of brothels I've visited the maids have been ancient former WGs. The only exceptions I can think of was the maid on Kensington Mature Escorts and a place in Stratford (I asked the latter and she said no, which was a pity as she had a massive pair).
Also in Stratford, I was getting ready to walk from one dire place when the maid (in tracksuit, no less) said "Would I do?" - she did and I thoroughly enjoyed her orbs even if she was a bit hatchet-faced. A similar story in a place in Walthamstow when I said the two WGs on were too skinny - the maid said "Well I'm not" and before I knew it we were on the bed, her jugs swaying. Both EE blondes around the 40 mark.
The 'ready to walk' thing also works in Chinese TCM shops, I've done a few receptionists in my time. Granted, some have said no, but some don't like to see a wallet walk out the shop and can find it in them somehow to get their kit off.