Open House is on Tuesday night, and yesterday was a Wednesday. There's a meetup tonight at 7:30 for Arduino newbies and enthusiasts that you may want to stop by and partake in. Hope to see you out!
I was personally a the space yesterday from noon to 10pm and there weren't any unaccounted for doorbells or knocks, so I wonder if you may also have been at the correct location.
We are a 24/7 access location, but there is no staff, nor are there hours when someone is assured to be there, outside of events posted on the calendar. The space is available at all hours day or night to members and their families.