Problem scenario
Does L.A. Fitness usually have hexagonal weight plates?
Solution
L.A. Fitness seems to use hexagonal weight plates. At 0:30 of a video it appears that L.A. fitness clubs tend to use hexagonal plates. You may want to call the club for more information.
Planet Fitness has smith machines without free barbells. So for deadlifting, it would not matter if the weight plates are hexagonal or round.
Gold's Gym, Anytime Fitness, Snap Fitness, Lifetimes Fitness, and Crunch Fitness usually (or always) have round weight plates.
24 Hour Fitness often has round weight plates available (along with hexagonal plates). To temporarily convert hexagonal plates to, buy a HexBumper device.