The playboys spend their nights splurging at the most expensive nightclubs.

playboys 是复合名词，由 play（玩耍、玩乐）和 boy（男孩）组成，字面意思是"爱玩的男孩"，引申为"花花公子"，指那些喜欢享乐、追求奢华生活的男性。