"The were two curtain tracks in the first room we stayed at, but only one fabric curtain. This was not a problem on the first night (although it is nice when curtain tracks overlap so there is not a gap where the curtains meet). On the second night, it was a problem as several very bright bursts of light came through the curtains throughout the night - bright enough to wake me up when I had dozed off.
In our second room, there were two curtains - one made of blockout fabric and one sheer. A much better arrangement."