Can you go age of 20

The restaurant yes.

While you do not need to be 21 or over to enter the Firestone Grill Room, our entry age after 8pm is 21 and up. Prior to 8pm, any age may enter as long as they are with a parental guardian that is 21 or older.

Yes, to the restaurant.

Yes

Try the seafood scampi and french onion soup