Here are a couple from recently that I like... The first is from a pub near Waterloo, OM-2n with 50/1.8 and oldish HP5+. I got talking to the guy and his partner just afterwards and we had a good long chat about film, smoking, art and society generally.
The second is from downtown LA - Ricoh XR-X with a Sigma 2.8/28 lens, EliteChrome 100. This was just before the time when the sun was starting to go down and I couldn't find my bus stop and was thinking "okay I really do not want to be here after dark, particularly with a camera that looks like it might be worth something even if it isn't". (Something about US cities makes me nervous, even having grown up in some pretty rubbish areas in London, though I do get used to them after a while - my ex chided me once for hanging around chatting to crack smokers in Baltimore.) Lots of wonderful architecture in the old town in LA.