r/etiquette

I wanted to study by myself and went to a cafe. They had multiple isolated booths along the back wall, some for small groups and some for large. All were taken up except for one large group table. It wasn’t busy so I decided to take it. Then 20 min later, a big group comes by and asks if I’m sitting alone. I say yes and they asked if they could have my table. I didn’t really mind because there were other tables but not the isolated booths I wanted. I get up and they say sorry - so they knew what they were doing was kind of rude. But if I also had a large group, it is kind of inconvenient. Idk I felt kind of weird about the situation. Is this rude or not? Don’t ever want to go to public places to study alone anymore.

At a back tie event is it ok for a woman to go and introduce herself to a man, or shall she wait to be introduced?

This is more for the UK, and there used to be rules where don’t speak unless you’re spoken to so I’m thinking if making intros by yourself is a no no? And please explain how intros should happen.