Startup Idea : Searching for available and relevant activities

My idea is to create an app which let you find activities as sports, movies, theaters, cultural events, music events and others. The problem of current apps as yelp, foursquare is that you find all places in the are. I want to make service providers to cooperate with customers, they will be supposed to provide opening hours, to inform if places are sold out. So customers will search through categories and find only the activities which are free for chosen filter, it means people will fill a day, time, place and other requirements and get a list of available activities, for example they get a list of movies they can watch in their city tonight, with prices and other characteristics. They will see all the movies in the city on one place and they will be free to book or buy directly their seats. The revenues will be from service providers for a made reservation as a percentage of the ticket price. People will get a discount for using the app. The app will bring customers to service providers and help customers to find the best place to have a fun.