Chili's® Grill & Bar, the seller of more margaritas than any restaurant brand in the U.S., introduces the Radical 'Rita. The eye-catching margarita takes '90s nostalgia to the max this May with TV it girl Tiffani Thiessen. Chili's® Grill & Bar, the seller of more margaritas than any restaurant brand in the U.S., introduces the Radical 'Rita. The eye-catching margarita takes '90s nostalgia to the max this May with TV it girl Tiffani Thiessen. Available for just $6 at Chili's locations nationwide throughout M ...