For those of you who are really familiar with Shanghai, a couple of questions related to my August 30 trip:

1) In hot summer weather, do men wear shorts in the city, or should I stick to long slacks?

2) I was a little interested in shopping for a radio scanner capable of receiving digital broadcasts from police/fire here in the US. There are two or three available for sale in the states, and I understand they are made in China. Any idea of a market in Shanghai where I might look for such things? Or is this just too esoteric, country-specific or dicey to be looking for as a tourist? I've certainly seen transceivers in markets; just never seen any programmable scanners.....

3) Are there any good tailors you'd recommend, like in Hong Kong or Bangkok? (unlike the other cities, I haven't seen any recommended here).

4) Any recommendation for a good low-key jazz venue other than the Peace Hotel? I'm not thinking of a club scene, just someplace to chill out with music in the early evening, not too far from the LeMeridien or the Bund waterfront....

Thanks in advance for any pointers.