At the Reeperbahn Casino (Das Kasino Reeperbahn) you can play the usual casino games, Black Jack, Roulette and Slot Machines. In year 2003 when we visited the Casino they didn't have any Poker tables. We guess they have that now, because Poker has become a very popular game.
The entrance fee to the Casino is €1 (atlesast it was in 2003 when we last visited), and for that amount you're allowed to stay for as long as you want. Unless they're closing for the day.
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Das Kasino Reeperbahn