Maguire's owner Mark Maguire laments that his North Dallas New American restaurant is a little too upscale for his tastes; his customers seem to keep pushing the check average up while he wrestles them by dropping prices. Maybe Maguire is a little off in that way. Maybe he doesn't understand that if you train your service staff to sincerely treat diners as special guests, they want to come to your restaurant and give you money; sometimes lots of it. People are funny that way. They like to unload cash on those who make them feel good. Maguire's servers don't miss a beat (and if they do, they quickly find it and replace it). They smile, they laugh, they know the menu, they're polite, and they watch for things that need to be done (even if you didn't notice the napkin slipped off your lap) and execute without the programmed jargon and choreography that can give dining that scripted-ad-libs-from-a-Dean Martin-celebrity-roast aura. Maguire is set to open a "casual" spot called M Grill & Tap on Cedar Springs in November. But if he doesn't watch his step, this one will scramble away from him up the scale ladder as well.