Very Hard

I have such a problem right now. I have a very dear friend who has kids that are ANIMALS! I know that is mean to say, but it's true. My friend has no clue about discipline. The problem I have is whenever we are out with her and her kids my daughter wants to follow her kids and act like them. Her kids don't sit down and eat nicely in a restaurant, they run around and climb on the chairs. They are basically horrible wherever they go. Today in the bookstore Elizabeth is chasing after them as they run around a stack of books acting like crazy nuts. I don't allow my daughter to behave this way. I'm sorry, but the bookstore is not a playground! I'm not saying I don't let Elizabeth have any fun, but I'm doing my very best to raise a little girl who will be kind, polite and considerate. Basically a nice person. I spent the entire time we were at the bookstore reprimanding my daughter. On the way home I felt horrible b/c all I did was get after her. I just feel it is so unfair to her to have to be exposed to this crap! When I take Elizabeth out with other friends kids she has such a good time, and non of this stuff goes on. When I leave most of our playdates with my friend I feel stressed out and annoyed. At this point I'm going to stop the playdates. I feel bad because this person is such a good friend, but Elizabeth means more to me. I don't want my daughter influenced by this garbage any longer. By the way what is with these people who just let their kids do whatever they want?????