With the prevalent pizza culture in New York City favoring pizza by the slice, even major chains have to adapt. I've known for a while that Papa John's has offered single slices for 99¢, but it wasn't until the other day that I noticed the PJ's near the Slice–Serious Eats office was in on it, too. I stopped by the get some pics.
Um, 99 cents is a bit of a misnomer. Tax ain't included. So the 99-cent slice is actually $1.08. (Apparently you can still get the heart-shape pizza at this location.)
Slice pies are kept in a small, heated rotating platter cabinet. When I visited, it seemed like a lot of students from nearby FIT were taking advantage of the deal. Which meant turnover was fast and that the slices didn't suffer too much from sitting.
And there's what the underside looks like. Cooked on a screen, run through an impinger oven.
* Only in New York, as far as I know. I've never seen it done anywhere else.