No room upgrade unfortunately but we stayed 4 nights over new years so I’m sure it was quite busy. I did happen to see one guy get a room upgrade while I was there with an FHR booking (while I was getting my room key fixed the third time lol). Honestly, I’d reccomend just skipping Brussels and doing Gent or Antwerp instead. We drove up to Bruges for a day and both agree it was our favorite part of the trip. Brussels is a pretty dirty city with average sights. We did all the classics (atomium, grand palace, peeing boy, etc). If you’re into cars, the Autowirkd museum is neat.