I've only ever had one "uncomfortable" experience while working mobile, and it was about this time last year. I spoke to this lady on the phone, and she told me she didn't live in the area, but she rented a flat here to work from during the week...didn't think twice about it at the time, and booked her in for a spray tan.
Went to see her, and the flat turned out to be a horrible place, a big old house split up into about 15 studio flats, paint peeling off the walls, smashed windows etc. I rang her to let her know I was there (doorbell was hanging off the wall!!), and she let me in. The most horrible place I've ever been to, the hallways smelled of urine and cigarrettes, there was a couple having a blazing row in one of the rooms etc. When I got into her room I realised what sort of business she ran....she was a "massage therapist"!!! Talk about giving us lot a bad name!!!! The room was boiling hot, dirty, obviously hadn't been hoovered ever...her massage couch was set up (beautifully, actually!), next to a double bed with dirty sheets which hadn't been made...there was an ancient telly sitting on a fridge in the corner of the room...and the whole thing had a really dodgy feel about it.
Needless to say, I did her spray tan and got out of there quickly!!! She did rebook for a few treatments but cancelled them the following week...thank God!!
As a client she was fine, she was a nice enough lady, but the situation made me feel very uncomfortable, especially as I had no idea who else was in the building too. I don't advertise that I treat male clients because I would never want to be put in a worse situation. However, I do treat males if I know their partner/wife/sister etc, and if they've been recommended to me.
On a general safety note, I always tell my partner where I'm going (leave him the address at home if it's a new client), and what sort of time to expect me home. I also usually call him when I'm on my way home.