You shouldn't be noisy around people since it disturbs them.
Greg works with Linus, who hates noise while he's working, and has to do a construction job in the office.
Greg wants to work on the construction job.
Greg works on the construction job after regular work hours.
Greg works on the construction job during regular work hours.
Linus gets the peace and quiet he needs to succeed.
Linus gets annoyed with Greg's noise and can hardly get any work done.