Mile 4: Where Tony Manero Stayed Alive With New York City Marathon runners now settled on Fourth Avenue for a lengthy stretch, many take stock of their pace, grab their first cup of water or high-five a child for the first of, oh, a hundred times. Perhaps they'll wave back to coffee sippers at Mocha Mocha or hookah smokers at the Gulf Cafe. They'll marvel at how many houses of worship line Fourth Avenue. Staten Island is but a memory, but signs for the congressional race between Michael G. Grimm and Mark Murphy, both of Staten Island, are present because the district reaches across the bay and encompasses much of Bay Ridge. Athletes will scan the sidewalks for family and friends who've taken the R train to Bay Ridge before they hop back on the subway in hopes of outpacing their loved one to another point on the course (Spectators looking for a specific runner should be on the runners' left for orange athletes and to the right for blue and green.) A few decades ago, Bay Ridge was known as home to generations of families with Italian, Irish and Scandinavian roots. Today, Russians, Asians and Arabs have arrived in large numbers. There is still a Norwegian parade every May. This is as much a cultural mix as any neighborhood along the way. There's even talk of hipsters moving in. What would Tony Manero and his "Saturday Night Fever" buddies say about that? The Peggy Olson character from "Mad Men" is also from Bay Ridge. This stretch has mostly low-lying construction, but there's a hulking brick building, seemingly in the middle of the road, dominating the landscape ahead. It is a residential complex called the Towers of Bay Ridge, at 65th Street. When runners pass it, they'll just about be at the Mile 4 marker. Goodbye, Bay Ridge. Hello, Sunset Park.