shower at the workplace

I'm throwing a shower for a co-worker and want to make it fun. Any ideas on co-ed games?

http://www.ltdcommodities.com/ltd_online/shop/main.htm

I guess it also depends on your relationship with the hairdresser. If I was going to someone every month, and tipping well all that time, I might expect a "test run" at no or little extra charge prior to the big day, but wouldn't expect that if I walked in off the street.