Anyone teaching group English lessons?

Ok, so another question for everyone out there. I have a couple of friends who would love to take English lessons but can't afford private classes. One has suggested that I offer group lessons to be held either in a cafe or in rotating homes kind of tupperware style ;) as I don't want to pay rent for a classroom just yet and my home is kind of in the middle of nowhere and inhabited by a 3-year old who would insist on being the center of attention.

Has anyone done group lessons?--without a dedicated classroom? And what did you charge? I've seen prices ranging from about 5-10 euros an hour around here.