Liz, some of these rooms while "owned" by Mudcatters are not Mudcat rooms and are opened as and when the owner feels like it. There can be various factors involved. I have found myself opening becuase I wanted a more folky biased mix than the Live and Unplugged rooms offer although I am normally quite happy in these rooms - just a question of mood. I have known someone open when the Live and Unplugged rooms have got too busy, someone else may open because a few people who like folk are around... I could be wrong but I think it is unlikely that those of us who like floating round a cross section of rooms are likely to wish to run to any schedule.If you want to start something at a set time, the best answer is to open a room yourself. The Snug may still be availible for this purpose. Failing that, you can always create your own room.
Jon