Really no reason, it just seemed like a nice round number at the time and one that we felt comfortable asking for their time for. We felt that asking for the 90-mintes was a stretch since it would be like 2 hours by the time it was done. We have had guests in the past that come on before and stay late, so it's really up to the guest themselves to make available other time.
We're working on a full complement of guests for 2004 so look for a monthly schedule pretty soon.