I think for MT majors it is difficult to plan to do more than 2 per day, especially if the audition has a dance call component. Also, some schools will do an on-site callback after the initial auditions so leaving yourself some margins is a good idea. The Pace callback was immediate - made the initial audition slot run quite late. Some schools hold separate dance calls on Sunday so maybe 3 per day if there are no dance calls that day. Finally, not all schools are at the Palmer House so budget travel time.