I will point out, the age. I've found elementary school more of branching out, but there lies bday party struggles with three. My oldest, I could toss a party and get plenty of response, with an early March bday. My middle is right next to the Columbus Day long weekend, forget it, might get a couple of people, also coincides with collegiate homecoming where people visit alma matas. And my youngest, hit or miss due to early January and weather conditions.

I find the 'just us' birthdays relaxed, they love their days, pick your restaurant, and relax...it came to being this way because of fairness...