Where can I go to audition vinyl audio around Los Angeles area?

You never heard vinyl, live under a rock?

Upscale...

any audio retailer of decent equipment will be selling Turntables and have impressive LP's to demonstrate.

be careful of first impressions, i.e. don't buy right away, get impressed, "yes I want this", next research, questions, 

start modestly, determine you will stick with vinyl, then after some hands on, finish your research.

If they are open by appointment (Covid?).

-Audio Element, Pasadena

-Acoustic Image, Studio City

-Upscale Audio, OC?

Audio Element is owned by Brooks Berden's son (heard that the Brooks Berden/Monrovia shop was moving to WA state).

DeKay

Good advice, I would add Optimal Enchantment in Santa Monica, Sunny Components in Covina. But I would be very upfront about your intentions to learn and discern….

jim