Originally Posted by RevJim

Here's a trick you can use at every grocery store that has loyalty cards to get the best prices:

If they require a loyalty card, they almost always allow you to type in your phone number instead of swiping your card. This is because sometimes you forget your card, your spouse has it, etc.

Instead of signing up for a card or giving them your private info, you can put in someone else's number. All you have to do is put in a number that is very popular and is very likely to already have a card attached to it. The best number to try?

(local area code) + 867-5309 from the song by Tommy Tutone.

So in Las Vegas type in 702-867-5309 and you will almost certainly get the discount. I've been doing this for years and it has never failed.