Not on runescape but back when i competed for Gears of War 2 i would pull a couple a week, take one day where when i got home passed out for the night and repeat
I was in a guild on WoW, which was considered a "late-night" raiding guild, i was up 3 am at the earliest, and 5 am at the latest, and that was 3-4 times a week, i enjoyed it but i find it impossible to do that and balance regular life.