Stanley Tarses is a likely reference to writer Jay Tarses who previously worked with James Burrows on The Bob Newhart show and We've Got Each Other.
In "The Great Line" , the cabbies are at Mario's. Alex tells a joke to the gang that has the punchline, "If I could do it my living room, I wouldn't have to do it in the back of my cab". In this episode, when the cabbies come into Mario's, Bobby says to Alex, "If I could do it my living room..", and they all start to laugh.
The theme of the fateful prom was "April Love". The band plays the song before Louie walks up to Sheila is "April Love".