From that story:
The venue said it found signs of external unauthorized access in the last week of October. It would have impacted some customers who used their credit card to purchase merchandise and/or food/drink items at Madison Square Garden, the Theater at Madison Square Garden, Radio City Music Hall, Beacon Theater, and Chicago Theater between November 9, 2015 and October 24, 2016.
"Every event and venue, every concession, anyone who's bought a pretzel, hot dog or a beer, is in trouble," said Paul Oster, a credit expert.