ULPT request: How do get a student ID card at a University that I don't go to?

Context: I am disabled(severe ADHD) hence I require late-night body doubling: a place open in the late hours, including weekends, where I can work on my laptop, and there's other people around also working/studying/hanging. Unfortunately the concept of late night coffee shops died after pandemic so not an option anymore. Coworking spaces become ghost town after 5pm so not an option either, so my only option are University library. The city I used to live in had a donation program, where if you donate, you are given a card that gives you library access. Another city I lived in allowed for non-matriculated registration which would give me a student id card. I recently moved to LA, and unfortunately UCLA does not allow for unmatriculated registration. They have some certificate programs but those students don't get the actual card, they get a different version. The only people that get the actual id card are those who are full time students. ID card is needed for the late night library (Night Powell). Normally students have to swipe/scan their cards to get in after 10pm. But if you are already inside by 10pm, all you need to do is to show it. But how can I get a card?