Maybe there are other ways to manage this by trying (for example) to find a holiday where you won't find many English speakers?
Or perhaps if you took a villa you could still go out for a drink or meal but wouldn't keep bumping into the same people?
Or is he chatting in (say) Spanish to locals anyway?
Maybe he just loves to socialise?
In that case could you say to your new friends "I had a lovely lunch with you today but I'm afraid I just like to take to my room of an evening with a good book... but maybe Mr Shimmer might like some company?"
Then if you wanted to you could go for (say) one drink and then leave early "that's me for the night now" and off you go to get to your book?
I think having a strategy in mind may help.
I've discovered that it's hard to say no but much easier to say it straight out than to try to extricate yourself later.
Works "jollies" spring to mind here... 😬😬😬😬😬
Unite the Kingdom and Pro Palestine marches Cup 16th May 2026
