Share 'Where is My Classroom?'

Here is a guy (me) that could be teaching kids (or adults I suppose...) how to speak Mandarin Chinese, how to get various computer certifications, martial arts and a number of fun, random and interesting things yet... Where's my classroom? I'm sure I'm not the only one that has cool things to share. Why is it so hard for me to find a venue to share these things? If it's for kids, I don't even wa…