Bucky does pause to take in the lights, glancing around the room for the overall effect. Very intentionally he tries to ignore the distraction it makes, how it could cover for an assault at first. He still marks every entrance and exit, everything that could become an improvised weapon, but some habits can only be broken so far.

"Nice. A little weird, but nice." The color does give things a sort of fanciful air. "Kind of reminds me of Christmas."

It's just a pause on the route to take their seats.