@Crimmy:
There certainly won't be any restrictions against it.
I have to admit - I'm not very familiar with 1920s America, or even modern New York City and what ethnicities are prevalent; this is really my first time roleplaying it 'properly'. For that reason, I'm not really concerned about what people choose to play as long as it's within reason.
I'm eyeballing that 'historical' tag and wondering if I should take it off. :U