Dean, I don't think it matters if it costs us as members or not. I look at it this way. When I join a club, I pay to get certain perks/discounts. When I am a guest of someone at a different club, that's all I am (period). As an example, let's say some Museum members get a 20% discount on purchases in their store. I go with a friend who is a member. I don't expect to get any discounts on any purchases I make just because I'm with a member. If I want the discounts, I'll join the museum.
Maybe it is petty. My feeling is if someone wants perks/discounts, join the club.
Cyn