Orlando, which holds the number-one position this year, has ranked first four out of the five years Cvent has been creating its list; while Chicago and Las Vegas exchanged places, with Chicago moving up one and Las Vegas downshifting into third. Here are the top 10: 1. Orlando 2. Chicago 3. Las Vegas 4. Atlanta 5. San Diego 6. New York 7. Washington, D.C. 8. Dallas 9. Nashville, Tenn. 10. New Orleans Get the full story at Meetings.Net and the Top 50 List at Cvent