They usually bring snacks or meals to the players (if it's lunchtime), tea, coffee, or beer. When no player needs help, they are allowed to cheer for their favorite player (preferably loudly and with colorful language).
Get to the point and stop acting smart; otherwise, I'll have you banned from the premises. You'll be playing the tournament from the street:D. You'll sit on the curb with your laptop on your lap, connect to the internet, and play:D :D :D