What subway do you take from Penn Station to the New York Athletic Club?

Take the Uptown A or C trains (of the A-C-E, the blue line) from 34th Street-Penn Station to 59th Street-Columbus Circle (at the corner of 8th Avenue and 59th Street, aka Central Park West and Central Park South).

The New York Athletic Club is at 180 Central Park South, between 7th and 6th Avenues but near the corner of 7th. So walk one block east on 59th Street/Central Park South to 7th Avenue, cross the street, and 180 should be right there.