Margaritaville at Flamingo will be expanding to include its very own branded casino, which will be located near the restaurant in the former Steakhouse 46 location. The area is scheduled to open in August.
I'm guessing this will be similar to other themed casino areas at Caesars Entertainment properties like the Pussycat Dolls lounge at Caesars and the Toby Keith party pit at Harrah's. Expect lots of 6:5 blackjack, dancing women and perhaps a mixed drink station nearby.
Source: FlamingoVegas Twitter.