The Plaza is a very small place. I would say only about 30 tables.
We have had ADR's there and still had to wait 30 minutes after our ADR time for a table.
We did enjoy The Plaza and got a Wish there, it was my Unbirthday and we got a table full of confetti, streamers and an Unbirthday cake, I think the waiters sang the Unbirthday song to us also.