My wife works in healthcare (specifically with olds) and getting grabbed and harassed is part of the job. People lose their minds when they get old as fuck. It doesn't make it right but there's pretty much nothing that can be done since restraining people became illegal.
I think it's the nature of old men. Go to any bar that has regulars and the old timers (70+) always flirt, go in for hugs, etc. The bartenders all put up with it and pretend they like it because it's part of the job.
Right or wrong, that mentality isn't changing....at least until the millennials are old, then it's the young men that need to be worried. For now, when an old dude gets handsy, give him male employees and move on.