Wave Taco opened in early 2009 on a once-vacant lot just north of Washington Avenue in downtown St. Louis. It imported several tons of white sand from Florida, set up two immaculate outdoor beach volleyball courts and declared its motto to be "shirts optional." Order the house specialty -- a supersweet concoction called the Frozen Margarita Swirl -- at the tiki bar, then try not to stare too hard at the swimsuit-clad coeds frolicking on the faux beach. The only difference between this place and a south-of-the-border hotspot is that the kids are drinking Bud Light Lime instead of Corona with lime.