"(Margie's At) The Lincoln Park Inn" is a song made famous by country music singer Bobby Bare.
However, this is all background, as the main subject of the song is about his recent adulterous relationship with a woman named Margie.
The two, as the song's title implies, had a sexual liaison at a motel called the Lincoln Park Inn.
However, he still harbors deep temptation for Margie ("I know why she's there/I've been there before"), and — still having her telephone number — knows full well that she is often a client at the inn and is probably there as he speaks.
In addition to Bare and Hall, "The Lincoln Park Inn" (as the song is sometimes known) has also been recorded by country performers Johnny Darrell, Johnny Duncan, Jimmy C. Newman, Ray Price, The Statler Brothers, Cal Smith, Mel Tillis, and Jack White.