Unlike @paryzer, I seldom go back to the same restaurant to become a regular, I just can’t, Paris has so many interesting restaurants I want to try. I don’t work in an office, so I have no lunch places that I can be a regular either.
I do have my fair share of restricted reservations, it seems this is more popular some years ago than now. Many restaurants that did that system ditch that after reaching a certain popularity and raise their price and you can sit as long as you want. My last meal with a time frame was a Michelin 1* place. Initially, I had reserved. Problem I had a medical appointment just next to this place, and I wasn’t sure when I could leave the clinic, I just cancelled the appointment half an hour before the reserved time. I popped up at the restaurant at the time I had reserved without the appointment, they told me that I could have my lunch there, but only for 55 minutes. Since I was alone, it was fine, I really want to try their “bargain” lunch tasting menu. They seated me promptly, dishes were brought out in an evenly pace. It was more a challenge for them than mine, as there were many tiny dishes. I finished the meal 5 minutes before my allotted time ended. They thanked me again politely when I paid the bill for the “help”. You can read it here: