Yes you are right daviemac about people joining, but, I know someone who owns a hairdressers and he rented his backroom to a masseur who gave various massages and beauty treatments. She also gave H/E massages to some of her clients unbeknownst to the owner. I was one of her customers and she was very good at it. Anyway one of his clients came in for a hair cut and said he had googled his hairdressers to get his phone number and his business was linked to happy ending massages and UKPunting.
Well he hit the roof kicked the girl out and so we lost another masseur. I believe he had a bit of a spat with admin about it. He told me all about it while he was cutting my hair - I of course looked surprised that this went on as I only used to see her to sort out an old shoulder injury.
He said it was not the fact that it was going on but the fact that anybody could easily bring it up on google and that some of the locals may get to know and complain about his business. But I could see his point as it was his livelihood on the line and all his trade were local people.
Personally, I don't think he would have minded so much if it been done discreetly without it appearing on google - he may have charged more for the room.