Desithai

Bangkok has three major purpose built convention centers. Most international trade events will be held in one of these three places. However, almost all hotels in Bangkok, as well as many in the main tourist destinations, have large ballrooms suitable for smaller events. All the convention centers have web listings of upcoming events:

BITEC

The Bangkok International Trade & Exhibition Center (BITEC) is one of the largest trade venues in Thailand. Their web site lists upcoming events.

Queen Sirikit National Convention Center

Centrally located convention center. Their web site also lists upcoming events.

Impact Arena

Located near the airport, Impact Arena is mostly used for major concerts, but also plays home to the occasional exhibition.