Quite a bit, I would say. Of course, it varies with where I'm living. Living in Berkeley/Oakland, most unsolicited conversations came from older residents of the more upscale neighborhoods (i.e., Berkeley hills, Rockridge, Claremont, and the like). I was (and am) interested in food and cooking so most of these conversations took place in the local butcher, bakery, or wine shop in the Rockridge area of Oakland. Students at Berkeley tend to keep to themselves and very rarely make the leap to start or acknowledge spontaneous conversation. Consequently, relationships of any decent sort can be difficult to find. I blame the hyper-competitive culture and the fragmented social experience birthed in the isolating work-intensity the university encourages (of which, I was a willing participant). In Seattle, people are friendly but extraordinarily passive. As corresponds, conversation is rarely volunteered out of what I suspect is this strange unambitious timidness which seems to weave the city together. There is, however, a "progressive" and overly-excited sort that pepper the Pacific Northwest. These types routinely engage in unwanted conversation as a superiority thing. They sense your approval of their wayward ways and launch a reactive preemptive strike. I should also say, I've received more compliments on my clothing in Seattle/Bellevue than anywhere else--this are almost always from the mouth of an older gentleman two or three times my age.