There are a few times in a person’s life when it makes sense to have a sex-segregated birthday party. One is when you’re turning 7 and the theme is princesses. Another other is when you’re turning 37, you and your wife have separated following reports of your philandering, and you’re staging a very public win-her-back campaign. According to People, “no girls were allowed” in Robin Thicke’s booth at his club birthday party in Los Angeles Monday night. Thicke reportedly arrived with Leonardo DiCaprio, who, on the basis of his rumored meeting with Harry Styles, might be an emerging celebrity mentor in masculine discretion. (What Taylor Swift is to young female celebrities.) Or Thicke and DiCaprio might be old friends from the Growing Pains days.