I guess the title might be a little too vague.
In Poland we have a multisport card: https://www.benefitsystems.pl/en/for-you/multisport/
This is basically a card that allows you to enter most of the sports facilities. Is there anything like this in France? I’m mainly interested at gyms and climbing gyms, or bouldering places.
Context: I’ll be studying in Lille for the Fall semester and want to keep training at the cheapest :)
There might be initiatives at your university to have discounts for sport activities. Which university of Lille will you study at?
IAE Lille
You can Google translate those pages: https://www.univ-lille.fr/vie-des-campus/sport
https://sport.univ-lille.fr/activites-physiques-et-sportives/
https://iaelille.fr/vie-etudiante/services-sur-les-campus/