are you saying they don't allow you to use the free weights, or you are intimidated by the big guys that work out there?
also - if you don't know the exercises, you can learn about them and actually see videos of people doing them at
http://www.exrx.net/Exercise.html . Please don't avoid weight training just because you are unfamiliar with the moves. The moves Shadow suggests are basic and easy to learn.
I doubt the 'Meatheads' are using any of the weights you'd use, anyway. (15lbs and down)
Everyone has to start at the beginning - even those big guys you see at the gym started small.