The male online lifestyle magazine chose Buenos Aires as No.2 city in the world for its Top 29 Cities of 2011. According to the poll, New York City may be “The City That Never Sleeps,” but compared to Buenos Aires, it’s dozing on the couch with a romance novel. This is the Latin-American capital of all-night revelry, with live music, sizzling tango and thousands of nubile young locals packed into the city’s megaclubs. Nobody does it the way Portenos do it: They’re out till 7 a.m. and…