Teens On Grandeur

Can anyone tell me if the think teens would enjoy the Grandeur. We sailed last year on the Adventure and although they never really used the faciliteis they met lots of other teens and had a great time. This year I am sailing on Grandeur and have been told there might not be many teen activities.
Also, can anyone tell us what the cafe is on this ship Up on Deck 11 i.e. on Adventure it was a Johnny Rockets, and on Radiance it was sandwiches etc.
Thanks