At the Thursday Concord MA dance our standard rate is $8, with students ("full time 21 and under") $5. Starting at the break, everyone pays $3. When the door tender goes away (with about 45 minutes to go in the dance) we put out an honor box requesting $2. Non-dancers do not pay. The student rate is a relatively recent addition to us, and we don't sweat the numbers too much even though the percentage of students varies from evening to evening. We don't keep tallys. My impression is that we started getting more students at our regular rate. Then we instituted the student rate. Then more students came. No way of knowing if this had anything to do with the student rate. I think that having a student discount, even if is just a buck, puts out a psychological welcome mat to students.