Rooty and I went to the Sonic this evening (Wednesday). We don't go often because the carhops at the one here don't wear roller skates. They do at the one in Missouri near where we visit, so we go there often.
Sonics are meant to be like old-fashioned drive-ins, with neon, the carhops, and parking under a canopy. You can also use you debit card at each menu, which is really cool (although very un-1950-ish).
You can hear what everyone else orders since there are speakers on each illuminated menu, including those in the middle outdoor sit-and-eat area. The order-taker repeats the order -- the one tonight ended each time by enthusiastically saying "Your order will be out when's it's ready.!" After hearing this 20 or 30 times, I began to wonder "As opposed to what? Bringing it out before it's ready? Bringing it our a week from now?"
When ordering, some people say "I would like..."
Others say "I need..."
Still others say "Could I have..."
The last two, I think, are creepy!
I don't use a preface, I just say what I want.