I do workshops or one-on-one tutoring on weekends. These are usually catered to individual needs.
I have done small children's parties [groups under 10] where we have done a simple craft activity or painting/drawing and everyone gets to take home their creations; I have done art and craft activities for dementia clients; I have facilitated a life drawing class for a hen's night; I have done TESOL classes using art as a learning device; I have done many private illustration workshops for both individuals and small groups.
Competence levels of clients have varied immensely, I am happy working with both novices, people who are doing a bit of art for entertainment, through to professional artists who may want to try a different direction.
As you can see, the scope is wide and costs for workshops/tuition vary. As a rough ballpark, I charge $80- $100 per hour plus materials and travel time, with a two hour minimum.