Practical art workshops
Practical art workshops around portraiture have enormous potential and can generate a dedicated following. You can often reuse the practical art workshops you put on for schools but direct the learning for adults in an informal learning environment.
It is worth putting on workshops people are unlikely to get elsewhere and a museum visit should always be part of the session.
Practical art workshops can be expensive to run as they need expert tutors and materials. People will pay if the cost is reasonable.
A good example: The Sir John Soanes Museum runs an extensive series of art workshops, including life drawing and portraiture, for example Life Drawing at the Royal Academy (£55):
Working in the Royal Academy’s atmospheric Life Drawing Room, become a Royal Academician for the day. You will be guided through your day by two tutors, who will help you develop skills and techniques for drawing from life.