Do you need to find a conference room to hold a community meeting? How about teach a yoga class or a run a monthly D&D campaign?
This would be an app and a website that allows the user to search community centers and other public spaces for available times and locations to hold their meetings/classes, and allows them to sign-up, reserve or pay for the space. Search criteria can be entered, such as number of people, price range (or free), square footage, amenities needed, or distance from a zip code. Community centers would be able to manage their rooms and times via the website.
An additional option: community centers and users would be able to advertise events open to public. Users could search for already scheduled events by key words or location.