There are two types of "Glee" episodes -- plot and insanity. Sometimes they try to mix the two together to varied results, but "Glee"'s at its best when it sticks to one of two forms. Disco Night was clearly insanity, but the kind where if "Glee" could always be this insane, who needs a plot? Which is not to say this story didn't have some purpose, it was just specifically one of, "Oh, remember those other seniors whose ambitions haven't had a A plot all year? Here's what they plan to do come June!" Plus with a lot of disco on top.
The first thing we learn is Blaine Anderson really likes disco, which he demonstrates by leading Mike and Britt through a performance of The Bee Gees' "You Should Be Dancing" as a possible tryout for Nationals, since this year's theme is "Vintage." Did everyone else completely forget that the competitions had themes, or is that just us? While Will is on board, and the show masterfully uses a clip from the original pilot showing his team's win at nationals doing disco back in the 90s, the rest of the club reminds Will and Blaine that "disco sucks!" Will is forlorn, until Sue reminds him that he should go back on his instincts and make it an album theme week, a la last year's Rumours, and combine that with prizing cause "the kids like swag." Voila, the group will compete with their best disco numbers to win a custom-made replica of John Travolta's white leisure suit. That's all the motivation the kids need, and they join Will, Sue, disco-loving Blaine and contractually-obligated-to-a-certain-number-of-songs Joe on Sue's light up disco floor for "Night Fever," also by The Bee Gees. It's loose and relaxed, with each student getting to pull out their best solo (Sam is still relying on his one stripper move) in a race for the coveted clothes.
However, this competition is rigged to focus on the three students Schue is most worried about -- Santana, Finn and Mercedes. He fears none of them are living up to their potential, and wants to use the story of "Saturday Night Fever" to inspire them to find and follow a dream. Mercedes is up first, and she declares that she's just as much star material as the Broadway-bound babes by breaking into The Trammps' "Disco Inferno" in the hallway, with Santana and Britt on backup, before declaring to the group that her ambition is to be like Mariah, to sing pop songs in LA, but she has no idea how to put herself out there, how to move to a new city all alone with nothing but ambition and make it happen. Cream might rise to the top, she says, but outside of New Directions what if she's just skim milk? Sam believes in her, though, and puts his secretely recorded video of her performance on YouTube. When he reveals it to her it's only gotten a little over 400 views. She's embarrassed, but he notes all but one are positive and they're all dying to hear her album. The two share a sweet kiss. Can the tales of Mercedes's LA career with her adorable stripper boyfriend be the first official "Glee" spin-off?
Next up is Santana, who sings "If I Can't Have You" by The Bee Gees, which Mr. Schue misinterprets as her love song for Britt and her intention to become a lawyer to fight for marriage equality. Santana schools him (and delivers some witty barbs including one about piano guy Brad keeping a Eurasian boy locked in a truck -- piano guy Brad is really breaking out these past two episodes). While Britt is her girlfriend, fame is her mistress and she's intending to achieve notoriety any way possible. Well-intentioned Britt misinterprets this, and after in-depth research on celebrities, determines that Santana needs a sex tape and leaks one of them, interspersed with video of Lord Tubbington doing household chores, and Santana isn't pleased. Although, since it's Britt, instead of lashing out she's quietly embarrassed and unhappy, which is an interesting change for her. She talks with Sue and Britt about how she was wrong and doesn't want fame by any means, and instead wants to do something worthwhile, and then Sue reveals that Britt had the better idea of applying to college for Santana and submitting her for a full ride cheerleading scholarship to Louisville. How many locations do we think "Glee" can keep up plotlines next year, or is "not New York" the clue for "no season 4 contract?"