I do a small chemist's shop in the centre of my town. The owner phoned out of the blue to offer me the job. I have no idea who she got my number from, but it's a nice, easy little number.
I don't do any other shops in town as I am sure they are already taken and I am not one to knowingly step on anyone else's toes. Were I inclined to canvass them I would just go in, ask to speak to the manager and ask if they needed my services.
John