It's fun to play at the Y-M-C-A (Don't pretend you have never heard that...)  High bidder gets a certificate entitling the recipient to a 1 month Full Time Marin Area Adult Facility Membership which allows you to take advantage of the facility at the Marin YMCA.  Exercise at the workout floor, use the weight training equipment, take a yoga, step, kick boxing or cycling class...it's up to you!