Jahn's restaurant slang (1983)

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   This menu was in the New York City Technical College's library.  It's from Jahn's (established since 1897), the famous soda fountain known for its "kitchen sink," "boiler maker," and other creations that I described here before.
   The menu is from 1983, but has an old-time look to it and tries (unsuccessfully) to describe origins of the "soda fountain," the "egg cream," and others.
   This, on page 3, is difficult to read, but still interesting:

         _LOOK ALIVE_
         _Order It In Code!_

_CUSTOMER_         _CLERK_   _Soda_ _Plate_ _Sundae_
Vanilla............White.....In......Up......On
Chocolate..........One or Black.In...Up......On
Strawberry.........Straw.....In......Up......On
Coffee.............Mocha.....In......Up......On
Walnut.............Nut.......In......Up......On
Lemon..............Sour......In......Up......On
Black Raspberry....Purple....In......Up......On
Pistachio..........Green.....In......Up......On
Butter Pecan.......Butter....In......Up......On
Peach..............Georgia...In......Up......On
Cherry Vanilla.....Red.......In......Up......On

_COMBINATIONS_  _SODAS_  _PLATES_  _SUNDAES_
Chocolate Syrup with Vanilla Ice Cream........Half
Chocolate Syrup with Strawberry Ice Cream.....Flatbush
Chocolate Syrup with Walnut Ice Cream.........Bayonne
Chocolate and Coffee Syrup with Coffee Ice Cream...Broadway
Pineapple Syrup with Chocolate Ice Cream......Hoboken
All Others By Color or Name

           _EXAMPLES_
Sodas--4 In--1 Half, 1 Straw, 1 Hobo, 1 Reverse
Sundaes--4 On--1 Green, 1 Purple, 1 Rum, 1 Sour
Plates--4 Up--1 Flatbush, 1 Broadway, 1 Bayonne, 1 White
Marsh--Always on Black
Fudge--Always on White
Split--Always on White and Straw
Unless Otherwise Specified
Large Coke--Stretch with: Vanilla--Blonde; Chocolate--
            Brunette; Cherry--Redhead; Lemon--Sour
Root Beer--R. B.
Pink Lady--Lady
Orangeade--O. A.
Lemonade--L. A.
Orange Juice--O. J.
Line Rickey--Rickey
Lemon and Lime--L. L.
Plain Seltzer--21
Hot Chocolate--51-2-3 etc. (See RHHDAS for "51"--ed.)
No Ice or Nuts--86 (See RHHDAS for "86"--ed.)
No Whipped Cream--Sundaes--Plain; Sodas--86
Cake with Ice Cream--a la White, Black, etc.
Cake with Whipped Cream--Spank It
Float--Hang--Same as Sodas--Plates
Malted--Burn--Same as Sodas--Plates
Frosted--Freeze--Same as Sodas--Plates
Frosted Malted Float--Mutilate It

(Also on the menu:  "COOLERIZERS" such as lemonade and Sprite and Tab.  "TWOSDAY... 3.85" is "TWO SUNDAES AND A SODA"--ed.)