Following the Manolo Blahnik sample sale this Thursday, the Christian Louboutin sample sale will reportedly begin on Monday, May 12th. According to Madison Avenue Spy: "A source that's close to the company has given us word that the sample sale will begin Monday, May 12th and run all week. Press invitations are scheduled to begin Wednesday, May 14th. Each press invitation no longer includes a guest."
She adds that the sale will run from 9am to 5pm Monday through Thursday, and from 9am to 3pm on Friday at the usual address, 306 W. 38th Street. You'll be able to find it if you just keep your eyes peeled for the usual decoy sign that says "there is no sample sale happening at this time." (There is.)
As always, you need to be invited to get in, and to be invited, you either need to be a member of the media (not this media, though), chummy with a sales associate, an actual client of the brand—meaning you regularly buy them full price—or a celebrity (see here, here, and here.) We've also heard tales of people being able to charm their way in on the final days.