I had an experience where the folks who worked in the quilt store weren't exactly unfriendly, but...
When one of their customers left the store, they started talking about her - lots of catty comments.
I left a few minutes later - no purchases. I couldn't bring myself to buy anything because I was wondering what they would say about me when I left!
Haven't been back to that shop since. I know it's human nature to talk about people, but you'd think that they could have waited until after I left to do it.