Does anyone know PowerBar Club this is legit or not ?

No its not a scam.
Scams usually involve you buying something or joining for a fee, sending money to an unknown location, but Powerbar Club is totally free. You have to sign up, click on ads and invite a lot of people to make money using it. The only personal information it asks is for your name, address, email, things of that nature. I mean if they send you a check you're name has to be on it right?

Basically you sign up, and download a toolbar onto your computer. On the toolbar you can click "Ads" a sidebar comes up and there'll be a list of 3 ads. You can click on any one of those (up to 2) and you just made money. The amount of money you make is very little, by doing the method I just describe you only make .003 cents. (not 3 cent but 30 percent of 1 cent) So you won't make anything substantial unless you and invite a bunch of people.

I wrote an article here if you'd like to look more into it. PowerBar Club Scam?