Family ticket
A family ticket is a single check-in that adds several people to the line at once, such as a parent and kids, so one person does the joining for the group.
Also called: group check-in, party check-in, add someone
Walk-in businesses see groups constantly: a father with two sons for haircuts, a dog owner with two dogs, friends getting nails done together. Checking each person in separately is clumsy, and it can scatter the group across the line.
A family ticket solves that by letting one person add the others in a single step. The important detail is how the group counts. Each person still occupies a place and a service slot, so the people ahead of them in line feel the added time, and the quoted wait should reflect it.
There is also a question of limits. If a shop caps the line at a set size, a group of three needs three open places. A good system adds all of them or none, rather than splitting the family.
How NextUp Walk-in handles it
One person can put up to 5 people on a ticket with Add someone, each with their own services and team member. On the Staff Screen each person is their own entry marked Family of N. Restaurants use party size instead.
Questions
How do I check in a family at a barbershop?
Use a group check-in where one person adds the rest, each with their own service. That keeps the family together in the order and gives an honest wait.