Ring-a-Ding-Ding!

 is a quest in Fallout: New Vegas.

Quick walkthrough
Now that you know Benny is at the Tops casino located in New Vegas, it's time to go find him. Let him have it!

If you speak to Benny and choose the peaceful resolution option, he will send 4 of his bodyguards to kill you after he leaves. But if you made the choice to kill him in the Suite you will have every bodyguard and dancer to deal with.

[Black Widow] - If you speak to the named guy at the bar when you first walk into Tops Casino, he will reveal that he is friends with Benny. If you have enough speech, he will allow you to carry guns in the casino and give you the key to Benny's room. Go up there, and take anything you feel like taking. Speak to the Yes Man machine and he will fill you in on the Platinum chip. Once you get this information, go downstairs and talk to Benny. There will be a [Black Widow] dialogue option. Follow this chain of conversation to seduce Benny into taking you upstairs. Have sex with him, and then there will be an option to kill him in his sleep. No one else seems to mind or suspect you if you dispatch him this way.

Behind the scenes
The title of the quest is a reference to Frank Sinatra's 1961 song Ring-a-Ding-Ding.