Founded in 2011, SideTour serves as a marketplace for discovering, booking and hosting local activities, with the company hand-picking and suggesting events to other users who want to touch base with hosts in a specific locale. Events typically average around 12 attendees, and can cover anything from history and art, to food and drink. It currently operates in Chicago, New York, Washington DC and Philadelphia, though expansions are on the horizon in the wake of the Groupon acquisition. Get the full story at The Next Web Read also "Groupon acquires European HotelTonight competitor Blink"