Always carry grooming kit in my bag, so I can lend nail clippers to whoever needs them *before* class.
Instructor has a couple of pairs floating around as well. Not to do so is just downright disrespectful of your training partners...
First thing I think I have ever agreed with that Renato has said. Must be this new Forum. Maybe Renato is really a robot and his backups were screwed up along with the 10thPJJ Forum...