Life is complicated enough. Don't let your liquor be that way. Unhappily, Houston has hundreds of bars and restaurants trying to hook consumers with ever-evolving concoctions. By all means, let them audition. Encourage them to pour all kinds of fruity and frothy mixtures to be zapped into life by 220-volt blenders, like some Frankenstein creation. Just don't let 'em mess with the margarita. Cafe Adobe understands this basic of the beverages. Drinkers can order up unlimited arrays of specialty blends. There's even a variety of margaritalike drinks for the asking. But the establishment also appreciates -- even honors -- tradition above all. Order up the perfect margarita. Let the Herradura Plata tequila unite with Cointreau. Even the lime juice comes specially made here, and it does a grand job of marrying flavors into an ice-crowned bond. Yes. The real margarita is the essence of purity. At the Adobe, this tradition is honored. Now enjoy.