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Some pieces from the Decades trunk show on Friday.

The nonprofit the Princess Project collects prom dresses to be given out for free to local high-school students. (Photographer: Sia McDonald)

S.F. Events: This week in style

Fill in the gaps on your social calendar, March 12–17.

Britex Fabrics bridal & evening wear event, Thursday, 7–9 p.m. Head to Union Square’s iconic fabric store and meet with six local custom-designers to realize the red-carpet gown of your dreams. 146 Geary St., S.F., RSVP or 415-392-2910. Click here for more info.

Decades trunk show, Friday, 10 a.m.–9 p.m. Hollywood-based shop Decades hits town with designer pieces including vintage Jean Paul Gaultier, perfect for next week’s gala. Mark Hopkins Intercontinental Hotel, 18th Floor, the California Suite, 1 Nob Hill, S.F. Click here for more info.

La Boutique tea salon pop-ups, Fridays and Saturdays. Nosh on goodies from France’s Kusmi Tea and Russian Hill’s Batter Bakery while lounging on restored vintage chairs in this boutique/gallery space. 414 Jackson St., Suite 101, S.F., 415-693-9950. Click here for more info.

The Princess Project giveaway, Saturday, 8 a.m.–5 p.m., and March 24-25. The local prom-dress nonprofit returns for two weekends of dress and accessory giveaways. High-schoolers only need a school ID but should arrive early—all the shopping appointments are typically taken before 8 a.m. 72 Townsend St., S.F. Click here for more info.