We Must Stop Meeting Like This, IV

 is an unmarked quest in Fallout: New Vegas.

Quick walkthrough
Entering the New Vegas Strip for the first time, you'll be greeted by Victor one last time. He will tell you that his boss (Mr. House) wishes to speak with you in the Lucky 38.

Detailed walkthrough
The first time you try to enter New Vegas Strip, you'll be halted by some securitons. Find a way past them and and immediatetly after entering The Strip Victor will be rolling your way again.

After some pleasantries he insists you visit the Lucky 38 Casino and meet its owner, Mr. House, who's been asking for you to come by.

Whether you accept Victor's offer or not, the main quest The House Always Wins begins.

Bugs

 * PC: If the player leaves right after passing the credit check, the quest will never occur.