This works only in the regular restaurants. Use this to gain access to SubWay Premium Service. I got this from a good friend of mine who used to work in the SubWay kitchen, and still make use of it frequently. Here goes.

When you go to SubWay to buy a sandwhich, you should know that there's a secret code in the form of an exact recipe of your sub. You want the wholewheat bread, halfsized, with chicken. Have it toasted. Refuse the cheese but ask for extra butter. No lettuce, but cucumber and peppers and that's it for vegetables. You want mayonaise sauce AND chili-sauce on that. The waitress will ask if you really want that, but stand firm and insist on this order. This is crucial to the process. No salt, no pepper. Not for take-away but for consumption on the spot. When you pay, give exact change, receive the single 'sub-club' coupon, put it in your mouth and swallow it while still at the counter. When you have done this all correctly, you will be taken through the kitchen to a special private room. The waitress will spend an hour with you, you can do all you want with her, she will love it and it is completely free of charge.

Now you also know why subway only hires clean, young girls. Protip: select your waitress by intelligent use of the line i.e. let other people in front of you to be the one in line for your desired waitress.

p.s. don't forget your Sandwhich when you leave the place! happened to me a couple of times hehehe :)