Hiya,
Sorry I don't know of anywhere but was wondering, If you're prepared to pay for a bedsit or simlar, why don't you just go the whole hog and rent a flat to do incalls from?
Newspapers are good for private landlords who wont want to know the ins and outs of everything. Just tell them you're a self employed something or other. I've found the best way to be in this business is to only disclose info about job on a need to know basis.
I offer incalls from my flat, landlord/neighbours don't know (I hope lol). All they're really bothered about is the rent being paid on time.
Love Alex x