Together with many other imposing buildings in the area, the building housing the Potsdam Spielbank Joker's Garden casino since 2002 was designed by Frederick the Great's master builder Georg Wenzeslaus von Knobelsdorff in the 1750s. Restored to its former glory, the elegant building now is the venue for card games, roulette and playing machines. Minimum age 18. Dress code: smart, jacket required (rental available).