Monday15:00–21:00 and 22:00–23:00
Tuesday00:00–01:00 and 16:00–18:00
Wednesday00:00–01:00 and 17:00–18:00 and 21:00–00:00
Thursday14:00–16:00 and 17:00–21:00 and 22:00–00:00
Friday00:00–01:00 and 22:00–23:00
Saturday17:00–21:00 and 23:00–00:00
Sunday15:00–17:00 and 20:00–22:00
There is no day of the week where she is simply absent. When the room opens it tends to stay open: about 2 hours at a stretch. Times are EDT; adjust for wherever you are.