We do a powder puff game at our school every year. Usually, student council runs it. It's a riot. We do it during the week of homecoming. Every day that week, we have a dress up day, and on Thursday, the day of Powder Puff, we have switch day, so all the students can get involved.
Girls dress like guys, and guys like girls.
Like I said, it's a riot. Any club could do that, really, though. The girls borrowed football jerseys from the guys, and some of the smaller guys even borrowed cheerleader's uniforms. Just talk it up, and put up a poster for each class for sign-ups. The junior or senior guys that dress like girls are usually the cheerleaders, not underclassmen.