A STRUGGLING gym in northern Spain hopes to entice new customers by offering nudist workout sessions, making it the first in the country to target naturists looking to get into shape. Liberal-minded customers in the northern town of Arrigorriaga are invited to burn calories in the buff at Easy Gym, which provides towels for comfort and to "prevent slippage on the equipment." "We knew we had to innovate because we were losing clients," said Easy Gym owner Merche Laseca. "Times are hard. There is a crisis. I need the money. I am not a nudist myself, but I don't mind...