I live in an apartment building that has a small residents-only fitness center. Recently, one of the new residents started coming in almost every time I’m there. She spends 45 minutes or more talking very loudly on the phone while walking on the treadmill or sitting on the bench. She wears headphones, so she doesn’t realize she’s basically shouting. Her conversations usually last the entire time she’s in the gym. On top of that, she sometimes laughs out loud or drops machine handles so they slam down with a loud crash. It makes it really hard for anyone else to focus. Most of the other residents are too shy to say anything, so I decided to politely ask her if she could finish her call after her workout. She completely ignored me and kept talking. The next time she came back, she behaved even more disruptively. It feels like she didn’t like my comment and is now acting out on purpose. The administration doesn’t monitor the gym at all, since it’s just part of the building, so there are no staff members around to enforce basic etiquette. I feel like I was polite and reasonable, since phone calls at full volume in a small shared space are disruptive. So, AITA for asking her to stop talking loudly on the phone in our small residential gym?