Steve/Tony
Steve was more than just a little confused. He had just been in the middle of something extremely important and now he was.. at a hotel? No Mjolnir, no briefcase, no Infinity Stones.. Just the clothes on his back.
He wouldn't panic. He'd try his best to assess the situation first. Get his bearings and go from there. It appeared as though the hotel was, for the most part, empty. So he'd follow the sound of music and laughter, bringing him down to the dock area where a party of some sort was going on. Maybe he could find someone who was willing to help him sort things out.
Steve must have looked awfully out of place, sporting that white quantum-hopping suit while most of the other guests were in evening wear. His skin would turn equally white, though, as he accidentally bumped into one of the last people he ever thought he'd see again. Steve quickly looked around him, as if his surroundings might help explain what was going on, only for his focus to fall back on the man in front of him. "..Tony?"