Short Answer: Of course!
Long Answer: Once your event is accepted by the restaurant, you will be given a shareable link to your own Meal Page where supporters can RSVP. These RSVPs are intended to give both you and the restaurant an idea of the turnout leading up to the event. For this reason we encourage getting as many of your supporters to "Commit to Eat" on the Meal page as possible, especially if you have not yet met the RSVP Minimum.
However, we do encourage all supporters to come out and take part, even if they have not yet committed to eat on your Meal Page! Their sales will still be accounted for as long as your supporters inform the restaurant that they are dining in support of your group.
Note: Don't think you'll make the minimum in time? Talk to them! We have recently launched a new feature allowing the restaurant the ability to override this RSVP Minimum requirement.