Dating is not easy when you are a female in your 50's.
I do go to folk venues (not with the intention of trying to meet someone) but because I like the singer or singers/guitar players that are performing. I go to different veneus, house concerts, small folk venues and folk festivals during the summer.
I have not had any luck meeting guys even though it would be nice to meet someone who is interested in the same music you are.
I see men at these folk events of course, but they are with their wives. They are men who are in my age group, maybe some in their 40's & others might be older but they are never alone.

Even at the church I sometimes attend, the only singles are guys/girls much, much younger then me, 20's & early 30's.
The older men there in my age range are there with their wives. No, no one where I work available either. It is a small company and not a place to meet anyone. Once went to lunch with a couple of ladies and we got talking about this. Both have brothers - around my age - one a little younger, the other one above 7 years older - but both guys are married and have been for a long time.

On-line dating - met a few - but were real jerks.
I take care of myself, am about 5'1" medium build - don't smoke, don't do drugs and just drink occasionally - but not a lot.
I travel sometimes - trains or coaches - but have not come across single guys there either. Guys 45 to 65 all seem to be married or gay. So....I have come to the conclusion that it just may never happen.