This Sunday I happen to have open (SS) but I have class most Sunday nights.
It will likely have to be Sunday as I have no desire to be in NYC for a night and the last flight back to CLE/CAK is at 8pm. So unless people want to do lunch on a weekday, Sunday it is.
But it doesn't have to be Sunday night though, it can be anytime on Sunday. 10am, noon, 2pm, 4pm, whatever people want.