It's been three days since you posted, and you've received several responses but haven't returned to the thread. That's unfortunate.
Please elaborate on this because it's incredibly important to your question.
Depends on what exactly "study hall" means. Is it simply a free period when you can pretty much do as you please? Do all the members of your "group" have "study hall" at the same time? Where would you propose to meet? What is the nature of the "two other groups"?
Please clarify what you're talking about here.

