Reviews for both courses are on Wednesdays & Thursdays, see the May post regarding times & locations. This is, obviously, the last week.
Otherwise, you are not to be with other teachers unless you have their prior permission to be there. They are busy on their free time getting their own kids ready for the Regents. There are teachers getting paid to help "everyone" and they should be your first choice on those days.
If you want to make sure you have review this week, be sure enough of your classmates sign up so it isn't canceled again.