It's possible. Just ask at the check-in podium on the second floor. I'd say your best chance is to "rope drop" and go right at opening, especially if a larger group. It's limited to the seats at the bar (maybe ~8-10 bar stools?) ... there isn't really "lounge" space anymore. At the bar, you are able to order a la carte whereas in the dining room the prix fixe menu is the only option.