Events - Alternative button instead of "Interested"

When making server events, for example for games. Sometimes a gaming sessions needs a certain amount of players and/or a maximum amount.

Right now everyone can click "Interested" even if the event can't have more than for example 10 members/gamers.

A suggestion is to make a choice, either an "Interested" button or a "Reserve a Spot" button that will queue anyone who clicks it if maximum attendees have been reached.

Also "Reserve a Spot" makes it more certain you should attend, being "Intersted" doesn't mean you'll attend so event organizers might get less attendess than expected if the button is "Interested" but with "Reserve a Spot" it implies you should be there for the event if you click it.