Complex sentence: Throughout the 1970s and 1980s, the club was popular but suffered a decline in popularity after the "Los Angeles Times" confronted the then owner, Scott Forbes, on allegations of racism and sexism.
Split into simpler sentences: Throughout the 1970s and 1980s, the club was popular. There was a marked decline in popularity after the "Los Angeles Times" confronted the then owner, Scott Forbes, on allegations of racism and sexism.