I have never seen Raglan be 'inappropriate' for young kids, but I do know that it shifts into more of a bar scene as the night gets later, especially as it is approaching midnight. We've had ADR's as late as 7:30 before, and never had a problem. But, I've also went through there (solo) for drinks at 10:30 when the band is playing (VERY LOUDLY I MIGHT ADD), and it definitely is more of an adult bar feel that late at night.
If you eat at a reasonable time, I would suppose ADR before 7:00 p.m., I don't think you'll find it inappropriate at all for young ones. IMHO.