As a table centerpiece, if you have a table of margaritas being replenished by caterers, you can make a wide, cylindrical paper lamp into one by piercing it with margarita umbrellas. Make sure that there are no blank spots, and the light will emanate beautifully from within.
Beach cupcakes: Use cupcake and icing recipe of your choice. Add blue food coloring to the icing. Roll half of the cupcake in graham cracker crumbs to look like sand. Add a margarita umbrella and a candy beach towel (I used “Rips” sour candy strips found in the candy aisle, but Fruit By the Foot or fruit roll-ups would work great too). You can use Teddy Grahams to look like surfers, swimmers, or beach bums.