I never tried it myself, so I might be completely wrong, but I think volunteer.module is just about that.

sales@killerglass.com wrote:

Hi All

I'm looking for the best solution in Drupal 5 for members to register
for an event.

Ex:

A charity motorcycle ride on "this  date"

Something where I am able to add extra  fields too along with multiple
events to register for.

Any suggestions greatly appreciated



Tim