More like presence today than real neighborhoods but I would say (in term of population, not stores or whatever):

- Dyker Heights, Brooklyn (13th Ave, Fort Hamilton /Bay Ridge Pkwy, 86th St, 14th Ave, 7th Ave...)

- Staten Island (Charleston, Great Kills, Arthur Kill, Tottenville)

- Queens (Howard Beach)

- Morris Park / Middletown Pelham Bay, Bronx (Williamsbridge Rd, E Tremont Ave, Morris Park Ave, Pelham Pkwy, Middletown Rd, Crosby Ave...)

- Throggs Neck, Bronx (Harding Ave, Pennyfield Ave...)

Too weak nowadays for the rest (Bensonhurst, Bath Beach, Ozone Park..)