Ring-a-Ding-Ding!

 is a quest in Fallout: New Vegas.

Quick Walkthrough

 * Speak to Swank at the reception desk when first entering Tops Casino to reveal that he is friends with Benny.
 * Pass a series of 3 speech checks (speech of 15, 30, and 45), and he will give the player the key to Benny's suite. A sneak skill of at least 50 will allow the player to carry small weapons. Speaking to Swank allows the player time to investigate the suite (by delaying Benny).
 * Alternatives you can speak to Benny directly and after speaking with him and passing a speech check, as him to meet you in his room immediately.
 * Deal with Benny.
 * Speak to Yes Man in the suite (13th floor behind the double doors) to find out Benny's plan and about the Platinum chip.
 * Once the player has gathered the necessary information, they can leave the Tops.

Detailed 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! You can deal with Benny in a few ways:
 * If you speak to Benny and choose the peaceful resolution option, he will give you the key to the Presidential Suite, and promptly send four bodyguards to kill you, fleeing the Tops Casino to The Fort.
 * If you pass the speech check to get Benny accompany you up to the presidential suite he will make you an offer. You can accept or kill him, or do both.
 * You can choose to kill Benny in his suite (which will then be listed as yours with a 'My Bed' option for getting Well Rested).
 * You can choose to kill Benny on the main floor of the casino.
 * If you forgive him, or simply do not kill him he will escape.
 * If you have the Black Widow perk, Benny will have an amusing 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.
 * Also using the Black Widow method, instead of having sex with him, the Courier can use the "" speech option and kill him. No guards hear or come in if done this way.
 * Also using the Black Widow method, you can let him live (after you sleep with him) and he will leave a note the next morning, saying you will have a spot next to him when he takes over.
 * If you speak with Swank and not Benny you can convince him that Benny needs to be taken care of. Swank will send Benny to his room where you can talk with him and also choose to kill him.  This won't cause the casino to become hostile to you.  If you kill Benny this way, you can talk again with Swank and you will get the Presidential Suite.  There are other dialog options with Swank besides Benny needing to be taken care of, and other options like working with Benny when you talk with him.  Note: Killing Benny in his suite, regardless of circumstances will not cause the casino main floor to become hostile to you (tested four times on XBox 360).
 * Regardless of how you deal with Benny, you will be ambushed in his suite by 4 of his bodyguards.

Once you have dealt with Benny and his ambush, if you have not done so already, go to the 13th floor and speak to the Yes Man. He will give you details of Benny's plan and will tell you what the Platinum Chip is. If you allowed Benny to escape, Yes Man will tell you he has done so and where he has gone, but you cannot follow him into the Subterranean Lift. Don't worry however, you will see Benny again soon. Benny also does not have the key for this lift so if you choose to kill him, you will not gain access to it.

After speaking with Yes Man, you will have another option for New Vegas, opening up the Wild Card series of quests.

After Benny escapes or is killed, Swank will take over as Boss of the Tops Casino.

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