When I was in Sweden, I saw a fun and funny wedding shower going on. The bride and her bridesmaids were on the street selling kisses. They were easily identifiable as a group: all had on the same green t-shirts and the bride had a veil on.
They had contacted a charity and were gathering money for the charity. It was very fun and for a very good cause. People were completely appropriate with the bride and her buddies. It was also completely unknown to me as a concept.
Tip: Do something fun and different for a wedding shower for your dear friend and generate a little money for a good cause!