My dear you found the secret to elevators. The front elevators are crowded and you have to wait forever. Secret is to stroll to the back and take the rear elevator.
I don't know what was going on with your beverages but remember the squeaky wheel gets the grease. I use the anytime dining and have had good luck. It is always a good idea to schmooze with staff to get their attention if you want attention. A few good strokes go a long ways so get in their face and compliment them often just so they know who you are. If you have a problem with a slow waiter just call the man in the white coat over (looks like the warden at a prison watching everyone) and let him know what your problem is.