I probably cant make this, but Ive shot a bunch in chinatown. I would recommend checking out under the manhattan bridge veggie market, Chatham square, Columbus park, Pell St., the front of the Manhattan bridge columns, also Grand St. Canal is a bit boring and crowded, plus its a pester when they try to sell you a watch or bag on every corner, but its unavoidable as it's a main street in chinatown. If you guys are up for the walk, SOHO isnt far at all, great place for people shooting.
or you can also check out more of the lower east side if you head down to Allen St. or further down to Seward park. There are tons of galleries and boutique shops there with a eclectic mix of people.