StumbleUpon guests were invited to "step right up" for a carnival-inspired holiday party extravaganza. Partygoers got a sneak peek at San Francisco's newest urban winery, Tank 18. The venue's open floor plan offered plenty of space for the classic arcade games, Zoltar fortune teller machine, s'mores stations, branded DJ booth and lounge seating brought in for the event. The carnival theme was woven throughout the event with custom-made banners depicting vintage circus performers and a carnival-inspired menu. Guests were encouraged to come dressed to impress in black & white attire, and were welcomed with an assortment of red masks, beads and boutonnières to add pops of color. (Images courtesy of Daniel Kokin)