How do I remove WP admin bar once user is logged in

Gday WPMU

I have Membership installed and setting up.

I've noticed that new subscribers see the WP admin bar at the top of the screen, and it has elements in it that I don't want users to access, eg. the ability to add events, portfolio items, etc.

I am surprised that the WP admin bar has any display for the new subscriber at all.

Can this be removed?

This is pretty urgent, any help you can give me is much appreciated.

cheers

Darryl