Question: "Let's Do It for Johnny!" by American rock band Bowling for Soup has its name in reference to that novel by S. E. Hinton that describes what two groups?
Context: The Outsiders is a coming-of-age novel by S. E. Hinton, first published in 1967 by Viking Press.  Hinton was 15 when she started writing the novel, but did most of the work when she was 16 and a junior in high school.  Hinton was 18 when the book was published.  The book follows two rival groups, the Greasers and the Socs (pronounced by the author as , short for "Socials"), who are divided by their socioeconomic status.  The story is told in first-person narrative by protagonist Ponyboy Curtis. "Punk Rock 101" is a song by American rock band Bowling for Soup.  It appeared on the second release of their 2002 album "Drunk Enough to Dance".  "Punk Rock 101" was released to radio on May 20, 2003.  The single peaked at #43 on the UK Singles Chart. Lunch.  Drunk.  Love is the ninth studio album by American rock band Bowling for Soup, released on September 10, 2013.  The album was completely fan-funded, as well as being released on the band's own record label like their previous album.  The band has released music videos for the songs "Real", "Right About Now", "Envy" and "Circle".  "Circle" is also the first single off this record.  The album charted at number 142 on the Billboard 200. Playlist: The Very Best of Bowling for Soup is a greatest hits album of material by American rock band Bowling for Soup, released on January 25, 2011 as part of the "Playlist" music album series by Legacy Recordings.  The album was released by Bowling for Soup's former label without the band's consent. Bowling for Soup: Live and Very Attractive is the first live DVD by American rock band Bowling for Soup.  "Live and Very Attractive" was released as a 2-disc set: one disc featuring the live show and documentary and the second featuring the band's commentary.  In the United Kingdom, "Live and Very Attractive" was released as a 3-disc including a bonus CD version of the concert along with the two DVDs. "Emily" is a single by American rock band Bowling for Soup.  It was released on their 2002 album "Drunk Enough to Dance", and appears as the second track on the album.  The single was the second single released from the album.  It also charted at #67 on the UK Singles Chart.  Like most singles by Bowling for Soup, it was written by lead singer Jaret Reddick. The Carry On EP is the debut extended play released by People on Vacation, a supergroup composed of Ryan Hamilton from indie rock band Smile Smile and Jaret Reddick from pop punk band Bowling for Soup.  The EP was released on November 24, 2011, in the United States both on CD and as a digital download.  The EP was released in the United Kingdom for download on February 13, 2012, and was released on CD as a split with Bowling for Soup bassist Erik Chandler's solo project on March 26, 2012.  The group released their full-length album, "The Summer and the Fall", on November 22, 2012, featuring the same recordings of "Rainy Day," "It's Not Love," and "Where Do We Go" from "The Carry on EP." Let's Do It for Johnny is the third studio album by American rock band Bowling for Soup, released on May 16, 2000 by Jive Records.  It was recorded at Reel Time Audio in Denton, Texas, about 100 miles from where the band was formed in Wichita Falls, and featured the group's first hit "The Bitch Song."  The album name is a reference to "The Outsiders".  It is the first album with Gary Wiseman on drums. Rock On Honorable Ones!!  is the second studio album by American rock band Bowling for Soup.  The title is a reference to the slogan of S.H. Rider High School in Wichita Falls, Texas, where Bowling for Soup hails from.  Based on the practice of Permian High School in Odessa, Texas (subject of "Friday Night Lights"), which is nicknamed "MOJO," Rider High adopted the slogan "ROHO" in the 1960s.  Rider's sports teams are called the "Raiders," and Rider students are informed that "ROHO" stands for "Ride On Honorable Ones."  This is the only Bowling For Soup album to include a horn section. Bowling for Soup, is the self-titled debut studio album by American rock band Bowling for Soup.  The album was recorded at C & L Studios in Summer 1994, and was released the following September on the band's own self-formed record label Que-so Records.  This release was limited to 3,000 copies and is currently out of print.  The band released digitally remastered versions of "Bowling for Soup", "Cell Mates", and "Tell Me When to Whoa" through iTunes and Amazon.com in October 2011.
Answer: the Greasers and the Socs