The Pennsylvania Society was formed in 1899 to help New York-based business barons maintain political and social contacts in Pennsylvania, where their interests - mainly coal, oil, steel, railroads, and merchandise - were located. Among the names dotting the early event programs were Mellon, Carnegie, Wanamaker, and Strawbridge.
These days, it's a dizzying array of dress-up parties, fund-raisers, and galas - anchored by the Pennsylvania Society dinner on Saturday at the Waldorf.
Through the weekend, reporters from the Inquirer and Daily News will be livetweeting at various events.
Inquirer City Hall reporter Tricia Nadolny is live-tweeting from today's final Philadelphia City Council meeting of 2014.
Come chat with Inquirer restaurant critic Craig LaBan at 2 p.m. Tuesday. This week's topic is the coffee scene.