During my university years, back when having a mobile Internet (or even a functioning smartphone) was somewhat uncommon, I've managed to set up quite a collection of such Wi-Fi access points :). I'd casually ask people I spent time with for Wi-Fi access when opportunity arised (I didn't have to invent a reason, there eventually always was a good one). Student life being what it is, I was often out and about at weird hours - so it sometimes happened that on the way from one place to another, I would detour to park my bike in front of some colleague's block of flats, and use their Wi-Fi to sync my e-mails and conversations.