Pedometer???

I joined a pedometer challenge for the month of May at work, so for that month, I'll wear a pedometer, and compete for a prize for whoever takes the most steps.

It's been awhile since I wore one, but I never used it to count any activity other than walking. Does anyone know whether it will count steps if I wear it while I'm working out on an Elliptical machine?

How about during a dance class (tap & jazz)?

I'm hoping the pedometer will register motion for those activities, even if it's a lower step-count than what I'd get walking or running, but I'd love to hear from anyone who wears a pedometer regularly.

Thanks.