Possible Clues:

• Billy Joel hit
• Semi-autobiographical Billy Joel song
• Classic Billy Joel hit
• Billy Joel classic sung from a lounge musician's point of view
• 1974 Billy Joel hit
• 1974 hit that begins 'It's nine o'clock on a Saturday'
• "Sing us a song, you're the ___"
• Billy Joel's first Top 40 hit
• Vintage Billy Joel hit