I'm in several music clubs in Tennessee, and here are are criteria: The primary consideration is if the instructor is coming a long way, and if it involves overnight stays. We try to get a $150.00 to $300.00 net to the instructor, which is usually about a four hour workshop. We try to get someone to let the instructor or performer stay at their home to reduce expenses. Sometimes, if we don't have enough members who want a particular person, several of us will chip-in to cover the fee. In other words, if you only have fifteen people who want a workshop, we will all pay $15.00. If we have thirty people, the club would just pay the $30.00. Sometimes, you can charge admission to a concert by the performer, either on the night before or the afternoon after the workshop. If you do it the night before, you can "whet the audiences' appetite" with what they will learn at the workshop. You can also have a performance of the materials learned in the workshop, in the evening after the workshop, that can require admission fees.