The term used for a $1 bill in a strip club/shake joint setting.
As one friend pulls out a wad of $1 bills, his buddy says to his friend:
"Damn man, look at all those those conversation starters...."
Another example would be:
Friend #1: Damn man, we heading to the shake joint so you know I need some ones.
Friend #2: We straight bro, I got change for dat 20 at the liquor store, so we got 20 conversation starters between the two of us.
Prices shown in USD.