Platonic Blam. Klaine but pre-Blam. This is a scene referenced in my Blam story The Best Laid Plans. During Santana's birthday party, Blaine and Sam disappear from the party and Kurt tracks them down. Much to his amusement, he walks in on Sam teaching Blaine how to strip. Or trying to. Again, while this short fic grew out of a Blam story, it is Klaine with Blam friendship.
After the events of my story The Best Laid Plans during which Blaine's casting in a new show leads to a break-up with Kurt and eventually ends with Blaine and Sam falling for each other, a group of producers decide to cash in on the fascination with Blaine Anderson's love life which now includes former best friend Sam Evans. This is a taste of a reality show centering on that Sam.
Sam Evans went to Dalton before transferring to McKinley. Blaine and he had been friends, okay maybe a bit friendlier than friends. They spent most of the year avoiding the awkward situation that would be actually speaking to each other despite being thrown together by Kurt's continued connection to the New Directions.