every one that can make it should check out this race, I went last year and was blown away.

www.metromintgiro.com

better yet, make it a part of your ride on monday and ride your bike to the race, then head up to marin afterwards (or vice versa).

they hold it in downtown SF, not the financial district but more near north beach, at levi's plaza if you know where that is. the website has more details, i'm not affiliated with the race so check the site for the real info. like i said, really cool race, fun for every one.