The town in Ireland that Alexis references in her elevator pitch is Lisdoonvarna in County Clare which hosts a matchmaking festival every year.
Moira tells Alexis "I'm starting to get keyed up about this prospect of a power mother-daughter power team. A modern day Judy and Lorna". Moira is alluding to Judy Garland and her second daughter Lorna Luft.
This episode mentions that David did in fact have a bar mitzvah.
While misquoting Alexis' idea about the singles festival in Ireland, but setting it in Scotland, Moira makes a comment about "a people as infamously disorganised as the Scotch". This is a common error, particularly in North America, but the people of Scotland are called ~Scots~. Scotch is whisky (or savoury egg snack) and it's a big faux pas to call Scots Scotch.