Singles & Friends Running Club is a San Diego running club that enables you to expand your network and make some new friends while making the best of your time. A relaxed and scenic run is the end-goal of most of their walks and runs. This is a stress-free club and so are events that they organize. They offer 5K, 10K and half-marathon preparations and all in between. Situated in San Diego, this is the best runners’ club in terms of the atmosphere we’ve seen.