Friday Night Birthday Parties?

R attended a pretty neat birthday party last night...the facility is a gym with all kinds of cool play things, and a swimming pool. For half the party, the kids swim. Then they get to go run around and climb and jump and roll and tumble in the gym. Then off to the party room for sugar (greeeeaaat, right?) The interesting part was that it was a party that started at 5:45 on a Friday night. I don't think I've ever seen that. I guess it worked pretty well, though. They had a LOT of kids show up. I guess I'm just stuck on Saturday and Sunday parties :)