Location, location, location. This applies to hamburger joints and hair cutting salons. Although your topic is most important to your success the venue has a big part to play as well.
Below is a list of types of venues and various cost associated with them. Of course prices may change from year to year and season to season this will give you some ideas on where you may present.
For a complete list of conference centers in the US contact “The International Association of Conference Centers”
Most major hotel chains are well set up for various types of speaking seminars and every major city has at least one convention center.
Common rooms & facilities: