Right now I see about 25 psychotherapy patients in a 3 day period and that is because office rental is so high where I am that I feel I need to make the most of it. I don't ever see more than 5 people back to back and usually that number is 4 or less. I try to have "lunch" or at least an hour break after seeing that many people. I also try to get outside, take walk, etc. Additionally, I tend to do about 1-2 private psych assessments a month. I'm busy, which is good and bad.
One thing I am noticing is different types of patients take different amounts out of me. For instance, I can't see multiple children under 14 in a row (in fact I won't see children on the insurance panels I take anymore) but I could see 4-5 college students/early 20s individuals. I also won't do more than 2 couples in a day.
OP, good question and something I am continually evaluating and re-evaluating.