We do; it's one of my DD's favorite places. They have an allergy book; they use a clean knife and put on clean gloves when we ask. However, our local place does have PB bagels. I worry about that --- I keep thinking there has got to be some cross-contam. So far, no problems with either of my kids, and we eat there often.
I would caution truly sensitive PA people, however. I sometimes wonder how sensitive my kids are to peanut. RAST is high/over 100 for peanut, but .... ? I don't really know.