speak for yourself. i have a dog for 5 years. i only ever meet married people and people over 60+ at the dog park.
there are no young single people at my dog park, besides myself.
hell just walking around, in a major city, only people who are 50+ will ever stop and say hi to my dog. nobody under 40 (my own age) will interact with my dog or me, if anything often they move to the other side of the street to avoid us. but if hte person has grey/white hair they are more than happy to smile and ask to pet my dog.