World Series of Poker
The World Series of Poker (WSOP) is a series of poker tournaments.  The tournaments are held each year in Las Vegas, Since 2004, the tournaments have been sponsored by Caesars Entertainment. The WSOP started in  1970. Benny Binion invited seven of the best-known poker players to the Horseshoe Casino for a single tournament/ The winner was chosen by a secret ballot of the seven players.