I would suggest that the WBF Worldwide Simultaneous Bridge Event which last year ran over two days and had 10756 people playing on the Saturday.
This event runs at the beginning of June every year.
See http://www.ecatsbridge.com/sims/wwbc/default.asp
No, the Super Bowl is the most watched sporting event in the United States. The most watch sporting event in the world would be the World Cup (soccer).
The famed sporting event is the Boston Marathon.
most frequent sporting evevt in wembley stadium
it think the Olympics
soccer
Footy
Olympics
Hockey, In Canada of course!
the most watched sporting event would be the Super Bowl. But also the Super Bowl is the most watched sporting event in the world with it being broadcasted to over 60 different countries around the world.
The summer Olympics ...
The Super Bowl
bocce ball