A few friends and I checked out the front of the Barclays Center on opening night last Friday. We were there around 1130 and it was very lively. There was a band playing very cool music out of instruments fashioned from plastic pipes. Another guy was breakdancing. The jumbotron was flashing lights, making it look like a club. There was a large crowd, but it was well-contained and the new subway entrance is well-placed for the departing crowds. My wife rode the B41 earlier in night (around 730) and asked the driver how traffic was; he said it was very smooth and not nearly as bad as everyone had feared. Walking home, I noticed that the crowd thinned considerably by Bergen Bagel and around St. Mark's, you'd never have known there was an arena and sold-out show nearby.
And, as hard as it may be for some to believe, it is now Monday and no one has puked on my stoop.