I sew alone most of the time, but I formed a sewing circle with three other friends (number's growing) with similar interest in sewing. We get-together at my house (or another friend's) from 10 am, have lunch (I love to cook) at noon, then continue with sewing/chatting until 3 pm. I don't get much sewing done because I have to prepare lunch in between, plus I can't concentrate too much while chatting at the same time. Nevertheless, it is an enjoyable way to share similar interests and get to know your friends better.
It is also a good idea to start a quilt block exchange.