RA Sushi, 7501 Lone Star Drive, Plano--"Mardi RA" starting at 9 p.m. with $2 domestics, $4 Absolut and Red Bull, $5 and $6 Mardi Gras-themed cocktails; food specials include $4 Cajun wings and $6 Creole crawfish; DJ Pete Mash spins until 2 a.m.