The hubs and I are having issues with some neighbors. We really like them, but every time we invite them over, or go out to eat with them, they will stay way too long; like 5-6 hours! Last week, I had them over for lunch at 1130 ...and they stayed till 5 in the evening!

They don't take hints, and I even tried gathering the dishes together and standing there saying, "Well, thanks for coming to lunch, but I have to go do this/that.". ...and the wife said, "Oh, we'll wait till you get back."
I'm looking at my husband and he's says, "Well, it's getting late and we got things we need to do". And they still won't take a hint.

We have gone out to eat with them before; met at 5:30 and they stayed until 8pm...closing time. I kept trying to leave, saying the kid had homework, and we needed to take the dog out, and they were like, "Ohhhhh, you have to leave so soon?"
I don't know why they think dinner dates are supposed to last so long.

Aside from being terribly rude, I don't know what to do. Anyone have any suggestions as to how to get them to leave my house sooner?