Yes, I see couples, but also some ladies on their own.
Its not something that happens all the time, but I love it when it does.
A few memorable ones were
-A guy from out of town was supposed to meet his GF who also was from out of town (they lived in separate cities, and were married but not to each other) they would meet up when they had conventions in the same city. He was snowed in and could not make it, so he arranged a suite at the Fairmount Pacific Rim and I met his GF and we had a most wonderful evening together. It was her first time with another girl. She was most thankful to her BF.
-A 19 year old who was super hot and wanted her first girl/girl experience. Did i mention how hot she was?
- A Lady who found out her husband was cheating on her and wanted revenge sex.
Those are just a few that came to mind but I find its often girls who want a first time experience, or have a hard time finding other bi girls.