Although a concert venue may seem like a very transparent industry the majority of the work is done by the support staff.  As the food and beverage manager at a local concert venue myself and a team of 4-15 people setup, broke down, and kept the concerts running from behind the scenes. While the performers would generally bring their own staff to provide most of the face to face interaction with customer (performers and openers) or even background interactions such as light and sound board operators.  About 10% or less of work by the venues employees are spent interacting with customers, while at least 90% of work is spent off stage and away from the ticket office.

I believe that this is the best working system of a concert venue. As someone who both frequently patronizes concert venues and has spent much of my life working both as staff and performer, the less you see the venue staff the better time everyone involved has. A seamless venue operates in a way that the patrons and performers feel that they are only interacting with each other, overly pushy and undertrained staff members that try too hard to influence the artistic liberties of the performer, or harm the experience of the concert go-ers can be very detrimental to a show. This being said the best venues feel as if there is no interaction because the work is being done in the proper order. The bussing of drinks should be done with minimal interactions and the perpetration of concessions or a stage should never be seen. A prefect concert can be seen as a magical experience and that is achieved based on the merit of the supportive venue staff.