Re: Uncooperative participant
Find out who his teacher is and call / write him or her... There's no way I'd allow a student of mine to behave in that fashion.
Also, talk to the Parks and Rec folks. Virtually every activity which takes place on Parks Dept property had some provision for dealing with an unruly or disruptive participant or spectator. Happens all the time.
Finally, if all elese fails, assuming the class goes along, you can "shun" him. No one talks with him, no one trains with him... it's as if he doesn't exist.