^ you mean the rooms that birds use as toilets?
It's sad really to see such a beautiful building, then you go in to see broken windows, graffiti and carpets of pigeon feces.
Due to the lack of windows and coverage though birds will get in, the money needed to spruce-up the Towers, repair windows etc (though in no way a full renovation) will never happen. If Merlin put the money towards it, they'd never get it back as if they advertised "New for 2014 - renovated Towers" it'd hardly bring in guests.
Sorry about that little rant!
I must say for me, a day isn't complete without a minimum of 30 minutes of whoring Oblivion at the end of the day, and I quite like to go up to the roof of the Towers and just stay there for a bit, taking in the view or listening to some music.
Doodle Doo Derby and The Farmyard are my guilty pleasure primarily due to the lack of game stands. I think are the best areas to "escape" in and the theming and are lovely, and the hosts are generally very friendly.