like-minded friends

Seems I have outgrown the party crowd - no longer drink and smoke and not looking for a hookup, the bar/Place Lux scene tires me and I prefer to go home after work and have a nice dinner and sleep.
But I would like to get to know some people for weekend activities: more and more I am interested in outdoor sports, although I am a beginner and out of shapre from years of long work hours. I would love to find a group that does something regularly - hiking, rowing, jogging, wall climbing, whatever - that welcomes total beginners. I would like to eventually find a sporty thing that fits with me and find friends with that comon interest, health and outdoor related. I wonder if anyone had suggestions of such groups or activities? Many thanks.