Blackstone's Jon Gray goes jogging and goes viral. I took a run with him.

Jon Gray and summer analysts ran through Central Park on Thursday. Blackstone I went running with Jon Gray, Blackstone's president and chief operating officer, and analysts. Gray's running videos have gone viral, and I felt firsthand why they're a good business strategy. After the run, a sweaty Gray talked to me about navigating social media as a young person at his firm. Around 7:15 am on Thursday, a photographer in a golf cart trailed a gaggle of young runners in matching black shirts…