Let's talk about eating and drinking first:

I once lived by the Pantheon and walked to Rue Mouffetard in five minutes. This is one of the famous food streets in Paris. I recommend two: Pot de Terre, a century-old shop on Rue du Pot de Fer, which is antique in decoration and has the style of an old Paris restaurant. I like its orange juice pork very much; Aup'tit Grec on Rue Mouffetard, Creperie opened by the Greeks, is cheap and good, and the queue is all the way to the street at peak hours.

another place where food is concentrated is not far from Notre Dame, next to Place Saint Michel. This area is more touristique, focusing on world cuisine, and it is also very cheap, but the quality is not particularly high.

by the way, it seems that this area in the fifth district has escaped Hausmann's transformation, so the buildings have not become the same Parisian style, and some buildings are still crooked and unique. There are more students in this area, which also promotes the development of all kinds of eating, drinking and having fun.