At the risk of sounding completely immature and un-lady-like....Here's what Suck for a Buck is:
Basically, when celebrating the "Last Night Out," the bachelorette wears the "Suck for a Buck" shirt, and people pay $1 to suck a piece of candy off the shirt.
I made $68 on mine 8 years ago. It was a crazy thing that my maid-of-honor put me up to. We had a lot of fun, but I'll never do it again. lol
I should say that we went to a local bar where everybody knew everybody elses name, and if you didn't know someone, the person standing next to you did. It wasn't a bunch of strangers.