Think it's traditionally been more of an East Side thing. Although I can say for an absolute fact they were still around about 15 years ago. I knew a family. All dead or in jail now.

Detroit definitely doesn't have any Italian neighborhoods; it only has a handful of Caucasian neighborhoods (if that any more) but there are some east side suburbs that have heavier Italian populations.

Detroit proper is such a circus and so corrupt politically, though, it actually would probably be one of the easiest cities in the country to do business in for the mob in terms of buying contracts etcetra. I'm not saying they ARE, just that even the least competent mobsters on average are more competent than, say, the Detroit City Council.