The greeting at Flo's is Down East direct and to the point.  "How Many?"  Don't even think of ordering one.  They'll know you're a tourist.  Basic order is three, four or five if you're a mite hungry.  A little while later they'll ask how you want them.  90% of the customers order Flo's dogs with the unlikely combination of hot sauce and mayonnaise.  So should you.  If you're looking for a more assertive dog, try one with hot sauce and mustard.

If you're over 6' you'll be stooping - the roof inside is kinda low.  I figure it's Flo's way of getting you to bow your head in homage to here hot dogs.