TYSONS CORNER, Va.--(BUSINESS WIRE)--Cvent, Inc. (NYSE: CVT), a leading cloud-based enterprise event management platform, today revealed its annual list of the top 50 cities for meetings and events in the United States according to meeting and event booking activity through the Cvent Supplier Network. Cvent sourced more than $8 billion in meetings and events through its marketplace in 2014. Orlando reclaimed the top spot on the 2015 list, a position the city last held in 2013. Las Vegas climbed