I looked up two of them in my county’s tax assessor’s digest. One of them had internal square footage of 10,000 sf, while the other had about 8600 sf. I am assuming that this included both kitchen and dining/retail area. See the following link. link You ought to be able to go to your county’s tax records and get exact numbers for the facility near you. But if I had to make a general guess, I would say between 9000–1000 sf based on this small sample.