Unger graduate who love to watch baseball games with friends

Charlie hauffe is an undergrad at Georgetown and loves attending gaming events. He knows about them through his friends and his searches on smartphone. The one problem he faces is finding one place where he has information about every single game happening in the city and be able to buy or know where ti buy tickets and the app should provide him with non sporting events too. He os willing to pay for it but only a one time download fee. He would love it if he can interact with and form a rsvp of his friends within the app.