For Bart Blatstein, it was business as usual - offering constructive ideas and giving back to the community. The real estate developer and Jewish Publishing Group president discussed his local roots and ongoing plans to revitalize the Northern Liberties neighborhood for an audience of high school seniors taking part in the Leadership in the Business World summer program of U. of P.'s Wharton School. Julian Krinsky of Julian Krinsky Camps & Programs, involved with the project for the past seven years, was instrumental in getting his good friend to address the group.