there was a blazing saddles in seattle for a while and their bikes were shite. def. geared toward tourists (you even got a free water bottle!) dont know who else might rent down there but blazing saddles=scary
Yeah the tourist bikes definitely look crappy and they have those stupid annoying bells on them. A friend rented a decent road bike from them for a triathlon which is why I think they may have a few decent MTB's.
I can't really think of anywhere else that might rent. Maybe search for something in Fairfax. Tamarancho is there and very popular (and also very fun) so a local shop might have rentals.
If you end up riding Waterdog then also try to ride Corte Madera (park at Skegg's point on Skyline). My favorite XC trails and it's not that far from SFO either.
You're welcome to join me and a buddy on a road ride tomorrow as well. Paradise Loop:
I know, it's road, but it's awesome! San Francisco for road, North Vancouver for mountains.