Although not on your Mercury sailing, I have sailed on her several times in the past. We have always met other gay couples on Celebrity. Wish we were joining you. She is one of my, if not my favorite ship! If you have never sailed on the Mercury, you are in for a great treat. You will experience the best service. If you have a butler, you will really be spoiled!
Have a wonderful time and enjoy the Beautiful Mercury! Hope to be back on her soon!