Between 4 am to 8 am (Mon-Fri), you can close your eyes and pick any equipment you want to use.
Definitely on Monday and Friday. As for busiest time I'd say from 4.30-7pm in the afternoon. If you wanna go when its least busy you can go early in the morning or Tuesdays wednesdays.
I don't know if all branches have this, my my home branch posts a detailed projection of anticipated crowd by the hour/day.
Thanks! Your answer is awaiting moderation.