Are there any books or PUA gurus out there that have good things to say to help out older men and / or help out with day game?

I'm in my mid-30's and don't care to go to bars. I do pretty good meeting women in coffeeshops and social gatherings but I'd still like to amp up my game a bit. A lot of material I read is focused on younger people and the game is tailored for the nightclub and bar scene. I don't really go to either much.

I understand that on a certain level it all works the same no matter what the context, but sometimes you still get little contextual tips that can help out a lot.