They will probably allow jerseys, but there is that outside chance it might happen.
Yeah Loft had that policy the first few weeks it was open. It was not just upstairs, but the entire bar/lounge/restaurant. I heard they felt like the jerseys made the place less "classy." They changed because it was becoming a ghost town compared to Dino, EAH and BCBG.
That is why I do not really patronize them as they basically looked down on Devils fans and only changed their policy because they were losing a ton of business.