But then again, if you think Lev Aryeh is too intense for your son, Be’er HaTorah may be a stretch. It’s a great place, as is Nezer HaTorah, but it doesn’t sound like what you’re looking for.
I have to fully read this thread to get a better picture, but have you considered Imrei Binah or perhaps Applebees? They seem less intense than Lev Aryeh whilst still providing a good level of care and attention. Especially Imrei B.