The barsupport role in Cameo is a job for tough guys.
You are the person the bar cannot do without.
A barback supports the bar in any stock and resources they might need during the night. If straws are running out you refill them, if a bartender needs ice you make sure they have it. It also includes restocking drinks during the night and you fill up all the barstations with drinks at the end of the night. Without this support the bar chokes and it interrupts the flow of the whole club.