When Cheryl and Pam do their "tell two friends" bit, they are referencing a series of memorable early 1980s TV commercials for the Fabergé Organics Shampoo.
When Cyril and Ray make a joke at Archer's expense, he refers to them Wheeler & Woolsey, the 1920s & '30s Vaudeville comedy duo known for their puns and double entendres.
Pam says her bush looks like she is sitting on the Grateful Dead lead singer's face, Jerry Garcia, who wore a prominent beard for most of his career.
Lana calls Malory "Ron Measly" for being cheap, which is a play on the name Ron Weasley - a character from the Harry Potter book and film series.
Archer mockingly asks Cyril why not try putting some Spanish fly in her brass monkey, a cocktail made with dark rum and vodka.