In anticipation of the rebranding in June of the National City banks in the Chicago market with the PNC bank name, PNC Financial Services Group has signed on as the lead sponsor of the PNC Club of Chicago, a deluxe 71-seat sanctuary being built out behind the third-base line at Wrigley Field. The new club will offer high-end catering, a full-service bar, concierge service, large-screen TV's and indoor and outdoor seating.