I wear my bike shorts to spin, never bothered with the mushy saddle. Sugoi has some lightly padded ones that are great. I usually do some weights first and they aren't so padded that I feel weird, but it's enough to keep me comfy during spin. I've worn my regular ones too, just not on the days I want to do weights.

Everything Annie said about class has been my experience as well. The instructors really seem to pay attention to who is new and make sure they are comfortable.

Veronica