I have known for years of the power of being braless.
It still amazes me how a woman without a bra can get things done faster easier and cheaper than one wearing one especially if she has a couple extra buttons undone.
Getting waited on at most stores and even services, guys seem to go out of their way to give help in hopes of getting a peek. Most women haven't found that the vast majority of men are willing to go that extra bit for a peek and not make a remark of any kind, and whenever possible do it for free in hopes that you will come back.
I found this to be true about 90% of the time years ago and it has been one of those things I am likely to do whenever I am in a hurry or low on funds or just simply having fun. It sure seems to make some peoples day and I have never been harrassed in any way for it.
Share your experiences doing this here or if you haven't experienced it yet, do so and let us know how it went.