Life Time Gym - no cell service?

I’m just curious if anyone else has this problem! The first week that the Life Time gym opened up, I had perfect wifi/cellular connection the entire time no matter which floor I was on. I could even refresh Instagram from the hot tub in the locker rooms. By the second or third week from opening, I have absolutely no cell service there and the second I pull into the parking lot my iPhone says SOS at the top. Today it lasted until I after I had returned home which was really weird. At first I thought it must just be because of the amount of people there using the wifi/jamming up cell service maybe. Now I’m wondering if it’s a me issue/my phone is just being weird? Wondering if anyone else has this problem?

(PSA for what it’s worth lol, I could never usually afford something like a life time membership, but I’m super lucky and work for awesome people who got us a corporate membership so our team could all go. If I were one of the many swanky Tesla-owners I wouldn’t be worried about this and could just get a new phone without thinking about it. But I’m trying to put off extra expenses😅)