IT’S THE 90-YEAR-OLD MAN who comes to the Community Center in Driggs almost every weekday to participate in yoga or Tai Chi classes, and to have lunch. It’s the 70-year-old man escaping the cold in his car, where he spends most of his time during the winter, to read the paper, eat a warm meal, and visit with other residents. It’s the 5-year-old boys who’ve become friends because of their …