My DSD is 14 and she is with us every other weekend and one night during the week.
She was with us last night and we had tea as a family, she went to her drama class and then she went up to her room to watch The Apprentice even though we were watching it downstairs.
As we don't see her that much, I thought she would want to watch it with us. DP doesn't seem to mind and I was always in my room by myself when I was her age.
Do your teens spend a lot of time in their rooms by themselves? She has just got a new boyfriend so I think she is quite happy to be daydreaming about him rather than spending time with us!