I've spent the past academic year doing an internship in Lowell, MA, a city of immigrants for generations. Lowell has the second most populous Cambodian population in the country and there is a large Latino, mostly Puerto Rican population. Before that, it was French-Canadian, Greek, Irish, and Italian immigrants. Many of the earlier generations don't move away, or stay in a neighboring suburb or two.
I have certainly seen evidence of increased riders in this population. Just like Bleeker St., in all weather, no special clothing. But, they are always riding against the traffic, in situations where it scares me to drive... I haven't commuted here, because of the traffic for the last mile of my drive. There's so much the city could do to make riding safer for these riders, as well as the burgeoning arts community/college students who live around here.
Interesting.