I've had similar experiences. I had an elderly 90+ year old woman grab my crotch in a bar, multiple times when I was in my mid-20s. Around that time of my life, I had multiple other women (mostly 45+ years old) aggressively grab my ass or touch me unsolicited in bars. One (who was married, mind you) tried to pull me into her vehicle as I was leaving a bar.

I never reciprocated or led them on. The most I can say is that I was affable and would indulge anyone who wanted to talk. I will admit that I never really felt threatened though, so I think that still makes the situation different than women experience.