Not-so-conservative party?

ORGY

Think of a wild gathering where inhibitions—and often clothes—are left at the door.

This clue plays on the double meaning of "party"—both a political group and a social gathering. "Not-so-conservative" hints at something wild or unrestrained, steering away from traditional values, which leads to "orgy" as the answer. The pun works because an orgy is the opposite of conservative behavior, while still fitting the "party" theme.