I thought of something like this a long time ago, and the reason I really wanted to do this was poor information on martial-arts classes. Now, if this is aimed

I thought of something like this a long time ago, and the reason I really wanted to do this was poor information on martial-arts classes. Now, if this is aimed more at spontaneous games, then it's probably not within your domain, but that's something I'd definitely be the most interested in. You should also add volleyball and badminton to the app. Maybe go crazy and add fencing, hiking and handball, too :)