Tripadvisor - The Tripadvisor mobile app is available for the Android and iOS platforms. It can be used to create reviews of hotels, restaurants, and to chat with other travelers on Tripadvisor forums.
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Wikitravel - This article is a Movie/TV Tour.
Event Hunt - Startups and Tech Events Curated By Locals
Foursquare - Foursquare is all about helping you find new ways to explore your city.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets