Hm, i like places where people move freely around, mostly since my game is fairly unstable still. Failing horribly in a set in a coffeeshop tends to be... well... the end of my sarges in that spot at least until the customers rotate again

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I like malls, shops, the street, etc. Malls are great. It provides coffeeplaces and other resting places, also gives you interaction by providing alot of people you can play off of and interesting shops you can weave and spin on. In addition the loads of people and the flow of it makes bombing a set no big deal, since it wont DLV you infront of your next set, due to them not seeing this happen.
Its just plain fun.