Get ready to formally welcome Arara boutique at its new-ish Mission digs with some formal wear of your own this weekend, when the store opens up its doors for its grand-opening and benefit for The Princess Project. Dig deep into your closet for those worn-once bridesmaids dresses, formal gowns, cocktail frocks, shawls, wraps and accessories and bring them to the party (clean and pressed, of course). The Princess Project will help a special someone look fabulous at their next prom, and you’ll feel good about spreading the fashion compassion.

You know what else will make you feel good? Sangria. Oh yeah. And independent designs from Arara’s in-house creatives, including shop owner Larissa V.’s Taste O’ Brazil and Recycled For Dancing‘s Deborah P.