I didn't know that Sbarro sells their pizzas at buy 1 take 1 during closing. I'm just not sure if it's near closing or after closing, as I passed by their shop past 10PM.
I wanted to try their Chicago White for so long now but haven't cause I find them expensive. But at buy 1 take 1, it's definitely a good deal.
Update: went to Sbarro Mall of Asia yesterday to avail of the buy 1 take 1 on their pizza, but were told that that promotion is not every night but on selected nights only :-(