Gym owners try to coax men into fitness classes > By TAYLOR ANTRIM New York Times > Published on: 06/09/05 NEW YORK — When Martin Vahtra persuaded his wife to join New York Sports Clubs with him, he had hoped they would motivate each other to go regularly. He hadn't anticipated joining her for step aerobics. "There were a lot of females in the class," said Vahtra, 43, an architect in Manhattan. "And there were these glass windows looking out on the rest of the gym. The guys on the weight machines were looking at me doing these silly moves...