Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
RecordGram - A studio and production marketplace in the palm of your hand
Facebook Local - Discover places to go and events happening near you
SoundBetter - Marketplace for musicians and music production professionals
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Gemtracks - Buy instrumental backing tracks and beats for $149! Get master ownership and copyright transferred to you once purchased.