I don't have the number off hand but it is online. Just look up T-Rex. I made reservations about 2 months ago for this next Saturday night. They told me they keep about 60% for walkups. I could only get before 5 or after 8 PM. I took the earlier because I have small children going. I don't know how long you have to wait without reservations but I am hoping not as long with reservations.