IMO it really depends on what all the teen is involved in at the time. My 17yo DS is a soccer player on the high school varisty team. He is also involved in several Bible study groups throughout the week. He has a GF right now & hopefully a job soon. I am not forcing him to go visit his dad because he is so busy. Now when I know his dad is off & wants the kids & I know for a fact DS does not have plans I do mention to him it would be nice if he goes & spends time with his dad.
As for my 14yo DD she has no say yet. She is not involved in anything other than school & ONE youth group that meets on Sunday evenings (other than the usual Sunday mornings which ex knows we always go to church so there is never an agrument there).