You can sign up for wine tasting at Guest Services, do it early because it does fill up (it's on sea days.)
I recommend Quiet Cove adult pool and spa (we've met many nice people there.) Also participate or observe pool games, they're alot of fun. Go to evening theme nights, and game show, cabaret acts and comedian shows in Rockin' Bar D. The more you participate the more people you meet.
The spa and fitness club activites are also nice adult times.
Since our teenagers "ditch" us the minute we get on the cruise, we've had wonderful times in the adult events. Now, there's even a few more.
Have a blast!!