Bike Attack = $50/day. No multi-day discounts. Sounds like they have few bikes for rent, so plan ahead and make sure they have your size. Staffer said they rent high-end bikes that would retail for $2K or more.
Helen's Cycles = $65/day Maybe possibility of multi-day discounts. Lots of different sizes; renting Canondale bikes CAAD aluminum frames (their affordable aluminum model)
Spokes n' Stuff = $30/day for road bikes but these guys don't seem very knowledgeable about bikes and don't even know what model road bikes they have (maybe something from KHS, they guessed?). English speaking ability was marginal at best. However, a competing shop that does not rent bikes said they "aren't the sharpest tools in the shed" but that they do have road bikes and that they maintain their rental fleet fairly well. Maybe worth popping your head in to check them out? Sounds like it is mostly a beach cruiser type of shop with a couple road bikes on the side.