How can I control limited seating

My Art workshops are only able to handle 8-10 guests at one sign. Is there a way to assign seat numbers?

That's possible through this app http://apps.jotform.com/app/reservation_form.

Or you can also use any of these widgets, define the options and the number of the available quantity you want.

http://widgets.jotform.com/widget/gift_registry

http://widgets.jotform.com/widget/quantity_gift_registry