Last week, I was invited (won a competition) to a recruitment event in Lisbon, Portugal (great city). Among other cool things, they were hosting a hackaton.
People could get together in small teams, and work on their idea over the course of one or two days (not sure). The organizers provided internet, drinks (red bull fridge - no sleep!), water, snacks, and even vintage arcade machines. It was all hosted in a room with several tables. In fact I've uploaded some photos taken on my mobile phone, for you to see. Sorry about the quality, the battery on my main camera was dead.
https://drive.google.com/folderview?id=0B9sxy-6YSoMyYnd3V3NhTURqaTQ&usp=sharing
Hackatons are really cool things. I've done one myself - when I didn't even know that it was called a hackaton; worked on an idea over a single weekend, with Monday being the deadline, and the result was pretty cool. Working in a social setting makes it even better, teams can socialize, exchange favors, and promote their work. It can result in some pretty nice proof of concepts, experiments even MVPs (Minimum Viable Products). At worst, you'll have the opportunity to work on something you'd like to work on, and something to put on your github profile.
It might not be too hard to organize - lebgeeks could be a good platform to start.
So, there you go, for an idea. What do you think?