Well Luke is a casual restaurant. So it really becomes blurry as to what is proper service. You would probably find it annoying for an upscale restaurant to ask you to keep your dirty silverware for entrees/dessert/etc.. but you'd be shocked if a place like Sammy's took your silverware (even unused) away like a nice restaurant does. Luke isn't podunk like Sammy's.. but it's certainly considered a casual restaurant in New Orleans. Shorts are even accepted.
True, this was my first visit and I wasn't sure exactly what type of atmosphere to expect. I was just thinking "John Besh place, should be top notch". It erked me that he didn't put them back on my bread plate if he wanted me to keep them, or ask me to move them. I don't mind keeping the silverware.
Anyways, not something to stop me from going back and didn't really take away from my experience. Just something to mention in this thread.