Girls Night Survey

Ok Ladies need some input.  The last two months of girls nights have been a bust.  They have been scheduled for the last Thursday of the month.  I thought having it the same night each month would make it easy for people to clear their schedule.  Here's what I would like to know.

How many even have interest in a girls night?

What night of the week works best?

Which part of the month works best?  ( Beginning, middle, end, doesn't matter)

Is once a month too much?

What time works best?