The show ended when I was 19, and going back and watching it since, I like how they almost make all of the drinks correctly. There is even one where Diane orders a Harvey Wallbanger (although she calls it just a Wallbanger), which is basically a screwdriver with Galliano on top, and while they are having a conversation, Sam makes the drink and sets it on her serving tray as just a screwdriver, and as she keeps talking, he pauses, points at the drink like, "Wait, that isn't right,", takes it back off of her tray, and then goes and gets the Galliano, puts it on top of the drink and then puts the drink back on her serving tray. Very subtle, and easy to miss since the conversation they are having is vital to the plot of that episode, but little stuff like that is really cool to notice now.