Madison Square Garden holds about the same—19,500 for concerts. So the O2 is basically London’s bouncy castle version of MSG, but with more tea and less New York attitude. The U2 Sphere in Vegas? That’s like 18,600, so the O2 still wins by a nose.
O2 Arena London seating plan - Detailed seat numbers - MapaPlan.com
Fun fact: the O2’s roof is so big you could fit the Statue of Liberty inside—if she were lying down and didn’t mind the echo. Imagine her singing “God Bless America” with 20,000 Brits. Chills, right?
