DS won't sit in circle because he's bored out of his tree... He doesn't like the group stories because they're too simple (which I think is a giftie thing), and because they're read at about 1/4 speed (or much less) compaired to what I do. And he doesn't get to ask questions, which is a deal-breaker for him, in any context.
I SO know what you mean about the stories and circle time in general. The only way DS2y4m and I get through it is for me to let him chew gum while he has to sit there. I’ve mastered a discrete mommy-hug/pop-this-into-your-mouth and so far the other kids and the teacher haven’t seemed to notice. It keeps him distracted enough to sit relatively still and quiet. I had to make it work somehow because I wanted the time out of the house (the rest of the program is okay).
DS’s “participation” has made the teacher warm up to him more (and to me too, come to think of it, I must be earning mommy points somewhere, ha ha, going to need those for kindergarten) and I think the positive feedback has been good for my little terror, ahem, treasure.

But if circle time is not officially required at the drop-in, I say - let freedom ring!