At an upscale restaurant this past weekend, our table started with a round of drinks. Each of our cocktails were placed in front of us in the center of large plates that were on our table already. I have eaten at many nice restaurants and never saw this before. Can cocktails be placed on the place setting plates? We each had a bread plate and used the place setting plates for the appetizers then they were cleared as our dinner was served. It made me nervous to have a martini glass directly in front of me (for fear of knocking it over!) and I moved mine from the plate was that acceptable? What were these plates for?