Area 51 is a private club for members. No hats are allowed, sorry. However, you can't take any beverages from the bar to the all ages area or vice versa. The police will tow you. Members get in free.
Ladies get in free all night on Wednesdays.
The Area 51 video game in the all-ages downstairs area is a nice touch. There's a soda bar upstairs and downstairs in the all-ages areas. Plenty of seats and spots to relax, even couches. That fact might be helpful to know when choosing whether to wear combat boots or stilletto heels. Just observing people is easy from one of the many dark corners.