"the Bird Cage is best remembered for the longest poker game in history that was played in the basement of the theater. To play, gamblers had to pay $1,000 up front. The poker game was played continuously for 24 hours a day, 7 days a week from 1881 to 1889, a total of eight years."
Me...
Cash (live): Holdem = +- 5 hours.
MTT (online): Holdem = +- 9 1/2 hours .