Forget about "Ladies Free Before Midnight" on Fridays & Saturdays that they promote on their website and in the hotel!!
My girlfriend and I went there Saturday on MLK weekend and got on the general admission line at 11:20pm. There are two other lines, the re-entry line and VIP line. After the line there was a security checkpoint and then you enter the club.
I quickly realized that they were holding the general admission line on purpose. Most of the time the security checkpoints were not busy and the VIP and re-entry lines were very short/non existent so you would assume they would let in the GA line.
The GA line barely moved before midnight (about 8 people got in on this line before midnight) but funny enough after midnight, the GA line miraculously starting moving at a steady pace, with security letting us in one right after the other.
The cover is $20. I have no issue with that. The issue I have is holding the GA line on purpose until after midnight so you can milk out a few more dollars from your customers. I'd rather just pay $40 for two people before midnight so I don't have to wait in line for 40 minutes, it's such a buzzkill. Make it less obvious with what you're trying to do at the very least.
Maybe I was wrong and they were really packed. But once I got into Opal, I realized that was not the case at all. The bar had no line whatsoever. I was able to walk right up and the bartender attended to me right away. This was the case the whole night. There was plenty of space to walk around as well with parts of the club with lots of space to really break out your dance moves. So I don't want to get a reply back from management and make the excuse they were extremely busy or sold out that night.
LADIES PRO TIP: If you want to get in free, get in line at 10, get your wristband, and you can always re-enter the club later.
Overall once we got in the nightclub, it wasn't bad. It's sad that trying to get in the club just left a bad taste in my mouth because the club experience itself was good. People were dancing away. It was nice to not be packed in like a bunch of sardines and have room to dance without people running you over.