Skillshare is a recent project whose purpose is to help people to learn and teach.
You can browse through activities and subjects available and select which classes you want to attend. You can also propose yourself to teach a subject you’re good at. All the classes are physical, no webcams or downloads involved.
It seems a quite interesting concept. Currently there are around 20 cities to select but from what I browsed only NY and SF had classes available at this point. The other cities need 500 votes (people from that area interested in using the service) and 50 projects to be unlocked, which also seems an interesting and smart approach.
Watch the video that explains a little more the concept and go help unlock your city.