A reader let me know that Iggy's Mexican Cantina (13645 Big Bend Road, Valley Park; 636-225-0500) is transforming itself into Flip Flops Cantina Grille. Iggy's remains open at the moment. An employee at the restaurant tells me that it will likely close for remodeling next week and then reopen as Flip Flops.
According to a post on Iggy's Facebook page, Flip Flops "will be beachy & margaritaville themed. Were looking for [a] fun relaxing atmosphere. Going to add some Caribbean dishes to the menu."