We used to attend what was refererred to as a Nooner party. It was a hotel room party that started at 4 pm and usually had intense play till around 6 pm or so. There were times where we went from a Nooner party to a different evening party.
While we'll still find ourselves up and about at 1 am at LS parties, we usually now need to get in an afternoon nap to enable that. The thing that made me think about this was P&Bs comment about being overly optimistic. It's not that we aren't still optimistic. It's just tempered by a dose of reality now ;-)