My guess is that the Ace Ticket sales reps on the phone get a commission, and that Ace Ticket purposely doesn't include the seat numbers online so that you have an incentive to wait until they're open and call the sales rep on the phone.
What is 'Collective Bargaining'. Collective bargaining is the process of negotiating the terms of employment between an employer and a group of workers.
Collective Bargaining. A labor union contract is also called a collective bargaining agreement. The negotiation process for labor union contracts involves two committees -- one that represents the interests of union members and another that represents management's interests.