I tried this once. Went to the dog park, chatted up a girl over a period of a month. I finally got the courage to ask her on a date, and she said yes! The date (dinner and a local concert) went great - we ended up back at my place and I can honestly say it was some of the best sex of my life.
Then she ghosted me and we never talked again. That was 2017, and I’m still not over it. Thanks for the advice though.