ArcLight in SoCal was the best movie viewing experience I've ever had. My wife and I, when we were dating, would go to opening nights probably a dozen times a year for different movies. It was 18+, reserved seating, and they had strict policies about disturbing the movie and would enforce them very quickly, with employees standing in the theater for the duration of the movie. Sadly, they went out of business (the pandemic crushed them) and I am not sure that anything has really replaced them.
Actually, it looks like the one in Sherman Oaks has survived relatively tact under new management (now known as The Culver Theater) but I haven't been so cant comment on the experience.