Hi-Fi Pizza and Subs was a rare place that would serve the Central Square clubgoers around last call, as well as the people walking home in the cold from a late night at MIT.
There'd be a welcoming warm light from the somewhat gritty street, and a fast moving line. You'd get to the front of the line, say something like "slice of mushroom, please", they'd always say "2.10, please", you pay and take it, and step to the side, to quickly shake the container of grated parmesan. Then you walk the rest of the way home (or back to the lab), munching the slice, soul recharged by warm tasty cheese and crust.
(Sadly, Hi-Fi closed years ago. https://www.wickedlocal.com/story/cambridge-chronicle-tab/20... I was very cross when it was quickly replaced by a vegetarian food startup, and I'm vegetarian. A couple weeks ago, the even more MIT-beloved food place, Mary Chung (which I first heard of as a kid, in stories of MIT hackers), also shut down. https://www.boston.com/community/restaurants/mary-chung-rest... )