The classic garnish for a margarita is a salt rim. To achieve this for a crowd, fill a saucer with lime juice, water, or a mix of the two. Fill a second saucer with kosher salt or coarse sea salt. If you'd like, you can add lime zest, chili powder, or other seasonings to the salt. If you're adding spices, mix no more than one part spice to three parts salt. Then you can wet the rim of your glass with the mix and dip the rim in the salt