There are a couple routes based on your location and business.
1. You could call this a corporate group. I charge no less than $100.00 for a corporate group hour. I bring stuff, there’s a lot of people. I get there early. Driving in my area has heavy traffic.
2. If a small group doing PT, I have an hour base price of $80 ($50.00 1/2 hour) for 2 people and then $5-10.00 more per hour for each added person.
3. For larger private groups, like a development or something, I make sure I get my $100 nut cracked while giving them a price per person based on COMMITTED ATTENDEES. I’ll tell them it’ll be around $10.00 per person. Then~If 12 commit for a 6 week class, then they pay $8.00 per class (Sounds good right?). They pay the full 6 week amount: $48.00 each upfront. Then there’s a high drop in charge of $12.00 per class to discourage. Works out great, all paperwork is done on the first day. Everyone’s happy.
If charging per attendee it just gets too confusing and time consuming!