Misleading headline. The arrest had nothing to do with a "playboy" party; the arrest was for throwing a party in which alcohol was served to underage drinkers.
Correct. KFI reported on this story this morning -- the birthday girl was 18, but many of her friends were still 17 or younger. (But I thought the drinking age in California was still 21, so even the birthday girl was illegally drinking, no matter if it were at her parents' house.)