Just thought I could help out here. The Teamster Constitution says there will be a convention every 5 years to elect a new president and make changes to the Constitution and give reports to delegates and alternates on the status of the union. I'm not sure of the exact number of delegates and alternates, but it wasn't 7000. It was an estimate of 7000 people attended the convention. This included guests, and retirees. The IBT is a not for profit organization and so if you are delegate or an alternate your way is paid by your local, with dues monies. This is a very important convention and is overseen by the US Government, under the consent decree. Let no one fool you, lots of hard work went into this convention to make it happen. I was one of the people that worked 10 hours a day to make part of it happen. I think Las Vegas is the venue because the amount of rooms needed and the room rates are able to be gotten at good rates. Just my 2 cents. DS.