>>405564401
You are wasting your breath. 80 people all in default avatars is still going to lag. All those animators and player objects are still running. VRC just does not scale well for events of this size and groups this big. You may save a few frames by enforcing certain optimization standards, but there's a few lag-causers like grabpasses that you can't detect anyway.
Want to help solve the performance problem, start telling people to stop using grabpass refraction/blur on their glasses. I feel like that alone would save a lot more than you would think and then we can stop kvetching about people being 1k polys over the limit.