I sew alone the majority of the time, but I really enjoy getting together with others to sew once in awhile. My MIL and I used to sew with a very nice lady, but she moved away, so now its just MIL and I. I think it helps me get through the "boring" parts of a project if I do them with someone else, in a time set aside specifically for sewing. Keeps me on task, I don't procrastinate as much.
It is a pain to lug my machine and all around, but I've got it worked out pretty well - I put my projects in a tote, and all my sewing gizmos in a plastic box with a handle I got at Wally World. I don't take the rotary cutting mat and ruler unless we're both going to be cutting a lot, I can just use hers. She has the same ruler anyway.