http://www.straight.com/blogra/461151/lady-gaga-worked-out-ron-zalko-gym-kitsilano-during-visit-vancouver Ron Zalko Fitness & Yoga has hosted a bevy of celebrities over the years. But few have shone as bright as the most recent superstar to visit Zalko's Kitsilano gym.   Over the noon hour on May 26, Lady Gaga dropped by for a workout lasting an hour and 10 minutes with other members of the club. And she even signed her name on the wall. "She was terrific and down to earth," Zalko told th