We're not too proud to admit it: We love mega-margaritas served in theme glasses big enough to house beta fish. But then we figured out why our cute summer shorts won't button anymore. A paltry 8-ounce serving contains 740 calories. And our mega-glass is easily double that amount. We could stop ordering it, but we'll probably just lighten the order. We'll trade the margarita's syrupy sweetener for tequila, Grand Marnier, lime and sweet and sour mix alone. We'll add a packet of no-calorie sweetener after it's served. Like we said, we're not too proud.