Are all of them though trained?
Plus, why should OP have to?
The man should have simply buggered off.
No one should have to escalate into getting bar staff when people could just leave others alone especially when they have shown and said they do not want to be bothered.
Heck, men don’t typically sit next to other men and expect a chat, they somehow are capable of leaving them alone, but many men seem to think women are entitled to give them attention when the woman obviously isn’t interested.
Women seem to not be able to win when it comes to such things:
Be polite - Should have been more rude/assertive
Be rude - Didn’t have to be so mean about it (insert excuses)
Ignore - Should have told him you didn’t want to be bothered or it’s just a bit of chat, why go to a pub/public place then..
This is rarely expected of men. While women have to worry if a man will come after them later or try to follow them if the man doesn’t like it and women have been assaulted or even killed because a man couldn’t accept a simple no. Few men have had to worry about this from turning down a woman, yet men are way more likely to be assaulted by another man.
I have been approached by men and thankfully many have been lovely, accepted my answer, wished me a nice day, and walked away but some.. ugh.. want to turn it into a debate/interrogation as if I owe them conversation when I just want to sit peacefully in a garden, park, and enjoy nature and/or read a book.