If there is just one of you you might be lucky!
I'm not sure if there is a difference between the partial view and box seats, because they sell the latter in advance and I would assume they are sold-out day off, but you can always try!
And if they don't have any you could ask for the Mid Mezz tickets that are $84 with a discount (Theatermania), or move on to one of the other shows nearby, since the Brooks is right in the thick of it!