The Flamingo’s Diamond Lounge is one of the smallest of the lounges. Rio may be smaller but they’re probably close to the same in overall square footage. The Flamingo packs in the chairs and tables where the Rio has some nice seating areas by the window, though. Still, they have a decent sized buffet and the servers are friendly and accommodating. They’ve also used the steak house bar seating and the Garden Bar as overflow seating when they’re really packed on the weekends. Yes, they can get back up good on the weekends and even on some week days during certain times because they are small but I’ve never had a bad experience there.