Look for cycling clubs in your area with google if you don't mind riding with a wide cross section of people (ie not necessarily young hip (and i use the term non pejoratively) fixed riders). Clubs have group rides and they are usually rated for how fast they will be so that someone of any level can get the kind of ride they want. Also I believe there is a local boards link on the top of this forum, you might have some luck poking around there if you want to ride with other fg-ers.