Avelez Hotel in Biloxi, built in the late s, was one of many hotels on the Mississippi Gulf Coast that Its site is now a parking lot for the Beau Rivage Casino. Mississippi Casino Information Mississippi has 35 casinos in which you'll find more than 37, slots and gaming machines. There are a total of table games. Use our interactive Mississippi casinos map to see all casinos in Mississippi. number, toll-free phone number, room rates, casino size, dining information.