I often will go when it is not so busy and I will often try to take the time to get to know the staff and find out how their day has been. If they speak a different language, I’ll take the time to say a few words, even if it is just thank-you.
I would say good service is important, but I think being a good customer is as well. For me, it is about people being happy when they are trying to do their work and if I can help in someway that’s good.
As a bit of a foodie! I like to eat at bistros as often they can be quite flexible with the menu when not busy and I often enjoy talking with the staff as they will often take the time to suggest dishes I might not consider.
Depending on the type of place I am dining at the FOH staff might have differing roles. Are there hosts or just servers