Like Agari (kinda) says, the benefit of a standing place to the restaurant is that they get quicker turnover, and can focus on cooking and serving food quickly instead of the usual division between kitchen and waitstaff. The benefit to the customer is you get quicker service, you get cheaper food, and that focus (hopefully) gets you better food.
As to the card, the implication is that the restaurant is part of a chain; Agari has only been to this location once before, since it only opened recently, but she's been to other Suddenly!! Steak places before.