For an indecisive person, the first weekend in May is always devastating. On the one hand, you've got the Kentucky Derby, that over-the-top celebration of horse racing, big hats, and one-too-many mint juleps. On the other, you've got Cinco de Mayo, that over-the-top celebration of the Mexican victory over the French at Puebla, big hats, and one-too-many margaritas. (See where we're going with this?) Read on for tips on how to throw a mixed-theme Cinco de Derby (Derby de Mayo?) fête with all the cross-cultural trimmings.