yes, it can. i been all-adult since 1992. i now have a school accepts kids, but i just own it, i hired a teacher to teach the classes. in my school, i just focus on what we are good at. it makes me happier, and i can develop my specialty and get better at it.
see this website,
www.goodtogreat.com , he wrote a book, and my consultant adviced me to read it. its a really good business book and they have something called "hedgehog concept", means, if you do ONLY your specialty, which you are best at it, you love to do it, and it makes you money, your going to succed. i tried all that business stuff before, EFC, MAsuccess, and none of them believe adults only will work. but it can.