A couple of thoughts that I don't think have been expressed yet.
On a busy day, use the group lesson to shorten the lift line if nothing else.
Use the instructor as a source of inside knowledge about the resort, as well as skiing.
If you are having a bad lesson for whatever reason, you can just bail knowing that lesson per se didn't cost anything.
Go during the week if possible. This has already been said. But there is nothing like paying for a group lesson and getting a private. I've done this a few times and it is great to take advantage of the situation. You can politely tell the instructor what you are going to do today instead of vice versa. They have no real reason NOT to do as you say.
On a busy day, use the group lesson to shorten the lift line if nothing else.
Use the instructor as a source of inside knowledge about the resort, as well as skiing.
If you are having a bad lesson for whatever reason, you can just bail knowing that lesson per se didn't cost anything.
Go during the week if possible. This has already been said. But there is nothing like paying for a group lesson and getting a private. I've done this a few times and it is great to take advantage of the situation. You can politely tell the instructor what you are going to do today instead of vice versa. They have no real reason NOT to do as you say.