Article in today's press about the rise in Staph infections amongst gay men in SF
http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2008/01/14/BAI5UE0L8.DTL&tsp=1

It's important to note that while this article focuses on the transmission of Staph from the sexual context this bacteria is highly resilient and can be transferred via shared surfaces. Gyms in particular have been singled out as possible breeding grounds. Consider covering up a little more (sweat pants instead of shorts), using towels and gym-provided cleaning solutions for benches.