I accidentally discovered that settlers love a bar and I think they are key to getting more and making them happy.
I have 4 vendors at Red Rocket and decided to put a bar. I was just messing around and built a staircase up to the roof and built a bar there. I didn't even assign anyone to it. I keep building and not even 2 minutes later I spin around and there are all the settlers on the roof (except my two guards) walking around the bar. I have 18, two were at the guard posts. I quickly built some chairs and they started sitting down and talking. Telling me about different settlements and places I should check out and going on about Diamond city and other random things.
Question: Do you know how much the Scavenging Stations help? Is it beneficial to have more than one at a settlement?