Selling Even # of Tickets

Former Member
Former Member $organization

One of our promoters is asking that tickets be sold in even numbers (2, 4, 6, etc.). Anyone have a clue as to how one might set this up? The web poses the same challenge but I think that must be done in the application. Any ideas?

Also, they want to limit one price type to be HABO. Any ideas on that?

Gotta love these creative selling strategies!