Quesiton re "interview at coffee shop" ??

My second round interview is scheduled around 8:30 at a coffee shop. I am not a coffee person. I only had "frappachino" at Starbucks before. Yet is it appropriate to order an ice coffee in the morning? If i only need a plain coffee, can i just say "a cup of coffee please"? maybe this is a stupid question, yet i never order a coffee before. and i don't want to screw the interview. pls give me some of your comments. thanks,