It's odd (albeit, not implausible) that Crenshaw, a Russian spy for the KGB, would use a German weapon. Luger P08: Not exactly a cultural reference, but an interesting detail: Crenshaw is wielding a Luger P08, a famously German handgun from World War I.Wedding Crashers (2005): While Archer is at lunch with Cheryl/Carol the flashbacks include him repeatedly telling her "just the tip" is a possible reference to monolog on dating given by the Jeremy Grey character in the American comedy film.Mission: Impossible (1996): The manner in which Archer lists off the security measures that guard the ISIS mainframe is reminiscent to the way Ethan Hunt describes the security system guarding the IMF Mainframe in the American spy film.Hungry Hungry Hippo: When offering Pam donuts, Archer tells her he'll dump them on the floor, and she can pretend that they're marbles and she's the classic board game.Johnny Bench: Archer makes a quip to Malory about the former catcher for the Cincinnati Reds famous for having big hands when he says "Johnny Bench called" after catching her masturbating during phone-sex with Nikolai Jakov.
(1964-1968): The entrance to ISIS being through the Four-Five-Six Laundry is a reference to the popular 1960's American TV program, where the "Agent's Entrance" was through a dressing room in Del Flora's Tailor Shop, which was also a dry-cleaning shop. For a much more indepth understanding of the joke, check this out.