We held our 3 Summer Code Parties in 3 different venues. The first two were in a coffee shop, the third one is in a university.
Photos of these can be found in http://www.flickr.com/photos/mozph/tags/mozparty/
You can run an event at home, at a restaurant, or in a classroom. All that you need are computers, an internet connection and an idea about what you want to make at your jam.
An optimal venue for a participatory event has:
Other considerations include:
Post a photo or a sketch of your event space and comment on at least one peers' post in the Task Discussion below.
I forgot to take a photo of the room when I left Mouse today, but I drew out a little floor plan of the space. The space is a bit challenging because we are essentially going to be in a common space, so people might be walking through the space.. which isn't ideal, but we will deal. We don't actually have a big wall to project, so we are going to tape up some big sheets of paper to a double door to make it work.