Answer:

disco

Answer	Crossword Clue
DISCO	"Saturday Night Fever" joint
DISCO	Dance style
DISCO	'70s genre

DISCO	Contemporary music
DISCO	Bygone pop genre
DISCO	... Demolition Night (infamous Chicago stadium event of 1979)
DISCO	Hustler's milieu?
DISCO	'70s hot spot
DISCO	Hustler's genre
DISCO	Summer's genre
DISCO	Summer genre?

DISCO	"Saturday Night Fever" setting
DISCO	Spot for a hustler
DISCO	Tony Manero's haunt
DISCO	'70s dance club
DISCO	"Saturday Night Fever" dance genre
DISCO	Bee Gees genre
DISCO	Music for dancing
DISCO	Music associated with the '70s

DISCO	Nightclub
DISCO	Ballroom dance since the '70s
DISCO	Donna Summer's genre
DISCO	"Saturday Night Fever" music
DISCO	'70s dance genre
DISCO	Dance hall
DISCO	Kind of ball
DISCO	Studio 54, for one

DISCO	Village People's genre
DISCO	Musical genre
DISCO	Hustler's hangout?
DISCO	Dance club
DISCO	1970s music genre or where to dance to it
DISCO	Saturday Night Fever sound
DISCO	Hip-hop place
DISCO	Popular nightspot

DISCO	Place to do the hustle
DISCO	'70s music genre
DISCO	Summer genre
DISCO	'70s dance hall
DISCO	Musical style