Reason 1:
Time to pass out the Pleasure Droids.
Reason 2:
Need to clean up the mess in row 3 after someone's light saber turned on.
Reason 3:
Did someone say "the servers are up".
Reason 4:
Need time to apply patch update 1.2a and emergency patch 1.2b before the next session begins.
Reason 5:
Need time to get to the next venue.
To get to the next venue, its down the elevator, across the parking lot, a short drive to parking lot C, across that parking lot, take the left elevator to the main floor, walk to the other side, the bus there will leave when numbers warrant, it's a direct trip to the next venue....