The song that Gerry plays to Vanessa on the piano is Gymnopédie No. 1 composed by the French pianist Erik Satie.
Tony Rountree, who runs the big poker game, is played by James Toback, who wrote the 1974 film 'The Gambler.' That movie was later remade in 2014 with Brie Larson starring. She who would later work with Anna Boden and Ryan Fleck in Captain Marvel (2019).
When Curtis and Gerry are driving to Memphis, Gerry asks Curtis his age. Curtis says he's 39, but Gerry doesn't believe him and tells him he's 35. Curtis admits to lying and says "I am 35." In real life, Ryan Reynolds was 39.