In reply to rob sykes:
my reason for going with a club is motivation, sometimes its easy skip a day or two of normal training if you arent motivated. Other reasons are to chat about kit, find new routes or races, inspiration from peoples race results.
I do prefer running on my own though and its usually the case as I dont always finish work at the same time, and there are some good running routes on my drive home so meeting someone there would be very difficult ad hoc.
Running on your own teaches self reliance but not always good for overall speed or endurance - having said that if your running partner(s) are slow then its the same issue. But there are ways around it ofcourse for going solo, using a gps watch / HRM or some other gizmo that keeps your pace up.
Why not have a mix, one day a week with a partner / group / club then the others on your own?
I dont know of any websites for meets like there are for biking or climbing, but there are plenty of running clubs around everywhere.
Post edited at 11:22