Everyone in your space is a guest, and regardless of their age you want to provide a unparalleled experience to be enjoyed. Just because someone can’t drink does not mean they will be a bad guest to host, especially if you have long term plans in place for you business. 20 year olds, will eventually be CEO’s.
Good management is recognizing that each one of your employees is different, thus their goals may be different. Take the time to make sales goals with each of your employees that is built around their identity. This will offer better revenue for the venue, and empower your employees.