This cluster of Hollywood retail establishments places unique pop-up stores alongside such regular tenants as Urban Outfitters, Umami Burgers, Free People and Hennessey + Ingalls. The multicultural complex is arrayed around an outdoor courtyard that hosts free concerts, film screenings and art exhibits, and it's not unusual to see rising indie-rock stars like Cold Cave and such veterans as Smashing Pumpkins perform surprise shows here. The confluence of so many different retail styles and aesthetic visions helps to bring an interesting cross-section of visitors, and Space 15 Twenty's interconnected walkways and sidewalks make it easy for the casual passerby to drop in spontaneously, whether they're checking out the art books in Hennessey + Ingalls' large, wooden hangar-like structure or shopping for clothes in Urban Outfitters' spacious store. Diners at Umami Burgers, which aspires to serve "fine-dining fast food," can sit inside the restaurant or at open-air tables beside the outdoor stage. Most events are free and all ages. Street parking.