Yeah, this has become annoying a few times for me and my later evening arrivals (7-8 pmish) as most CET rewards desks seem to close at 8pm on weekdays and 9 or 10pm on weekends. You Just have to adjust your schedule accordingly i guess. But can be annoying when you want your comps/vouchers/whatever else printed out and the desks are closed.
Really, how much are they saving on wages by not having at least 1-2people working the desks until midnight or later. As for cards, many times you need to line up for a new card or whatever and during the daytime hours the lines are insanely long and SLOW.... which most people don't feel like waiting.. so the casinos are missing out on getting new players playing with their cards at their properties.