I would like a list of the 10 U.S. cities that host the greatest
amount of conventions/seminars per year.

According to the annual Business and Convention Travelers Report, a
collaborative production of the Travel Industry Association of
America, the National Business Travel Association and the Institute of
Business Travel Management, the top 25 cities are as follows:

1. Chicago 
2. Las Vegas 
3. Washington, DC (metro area) 
4. Orlando 
5. Atlanta 
6. Dallas 
7. San Francisco 
8. Nashville 
9. San Diego 
10. New Orleans 

February 8, 2005 
http://www.hotel-online.com/News/PR2005_1st/Feb05_HabitsTracked.html

American City Business Journals, Inc.: February 16, 2005
http://www.bizjournals.com/pacific/stories/2005/02/14/daily35.html

Search criteria:
?top * convention? cities United States
Convention city rankings

I hope this is helpful!

Best regards,
Bobbie7

Perfect! Exactly what I wanted - and very quickly, too!