If you lined up exhibits in rows and made enough space between rows for nice aisles, made room around doorways, plants and furnature, you could probably fit 100 exhibits in this exhibit hall space.
But you would never want to do that. There are several things to consider when planning your exhibit hall layout...
Exhibit Load Time
Each exhibit loads a number of images. Every exhibit's images must load before the attendee is allowed to walk the exhibit hall floor. There are several factors while the exhibit hall loads (connection speed, computer memory, etc) that can cause the attendee to wait a while to enter.
Since the exhibit hall application will be presented by you (and possibly on your own website), we leave the potential wait time in your hands. If you have particularly patient attendees, add more exhibits!
GoExhibit is consitently striving to create the best experience for your attendees. The smoothness of animation as your avatar walks through the exhibit hall is our #1 priority. However, when the application has to process lots of high-resolution and detailed exhibit models, it make's the attendee's computer work harder. You'll see this when you load 100 exhibits in the exhibit hall. The walking animation will be "jumpier" and not as smooth.
We recommend 30 exhibits
30 exhibits seems to load quickly (5 to 20 seconds). And the amimation is still extremely smooth. With 30 exhibits, you can put 8 to 10 exhibits in each room, exhibits are easy to walk around and your attendees can distinguish the booths as they walk into each room.