Pubs
Yes, I have been asked for computer help by staff in pubs a few times.
One was having problems with their Windows 2000 (I think it was) PC. I told them I don't use Windows. They replied "Oh, do you use Vista instead?"
At another pub, some years earlier, they were having problems with one of the cash registers not working. I took it home and fixed the problem and took it back the next day. I got a good few free drinks for that :)