SF scenesters turned out en masse for the Louis Vuitton: A Tribute to Stephen Sprouse event at the Louis Vuitton Maison Union Square on February 24 where invited guests sipped cocktails and grazed on hors’ doeuvres while snatching up pieces from the brand’s graffiti and roses limited-edition collection.  A reinterpretation of Sprouse’s original Day-Glo graffiti-tagged designs from 2001, the revised collection of clothing and accessories launched in select stores on January 9 to the glee of many Louis Vuitton collectors. Ten percent of the evening’s sales went toward supporting SF’s Yerba Buena Center for the Arts.