"It allows you - in a very nice way, it's not socially awkward - to say, hey I'm hanging out on my porch," Gundotra said in a recent interview. "I'm available, if you're available too, you can join."Coincidently I recently explained the feature much differently to my parents. European style. Who even has a porch in Europe? No, no, Google Plus Hangout is like meeting in a pub. When you start a hangout, you advertise "I'll be at the bar. Come join me." Your friends will know which bar, at what time and even know which side of the bar you'll be hanging.
I didn't have to go into a long explanation of how the feature worked with my parents. It was as clear as a nice cold Belgian trappist.
Google might be on to something with their hangouts. (check out also the longest hangout)