michael hagerty said:"Funkytown" is disco. And while I can't really classify "Low Rider", I don't think that's funk, either.
Don't forget these early 80's disco tunes that sounded more like Disco such as;
"She's a Bad Mama Jama" - Carl Carlton (1981)
"Stomp" - Brother's Johnson (1980)
"Love Come Down" - Evelyn "Champagne" King (1982)
"Mandolay" - La Flavour (1980)
"Celebration" - Kool & the Gang (1981)
"Funkytown" is more like crossover between late disco and early new-wave / techno mix, not really classic disco sounding such as groups like Chic or Sister Sledge.