I'm just getting back to this thread, and for the poster asking how to adjust the clips on the pedals, there is a place to adjust it, using a hex screwdriver, usually at the back of the pedal. However, most clubs don't want the members in there messing with their bikes, so I would just bring this to the attention of your instructor, or to the management so they can have their bike technician go through all the bikes and adjust the pedals.

As far as the crank size being a problem, I'm not sure what every brand of indoor bike uses, but for the most part, the size parameters for these type of bikes is 5' - 6'2". Of course the bikes that can be micro-adjusted have the best chance of fitting the most comfortably.

I'm a 5'1" instructor and haven't had any problem fitting any of the different bikes.