This place is awesome! Love the Speakeasy for a good brew and hanging out in, the place is hugggeeee for a bar/drinking spot, they do trivia nights every Tues's around 8 pm, there is somewhat "secreat" spots in the top half of the place (it has 2 floors), huggeee outside patio for smoking, balcony.
Now one thing to consider when talking about bars... is entertainment and games... one super important things to note about the speak easy, there are NO POOL TABLES! Also... there are no dart boards for playing darts! What there is though... are shuffle board area and golfing video game machine on the top floors.
The vibe of the place is purely for talking, socializing, and lounging... it is the ultimate loungers bar in OKC. There are multiple bars in the establishment, 2 on the bottom floor, and 2 on the top
Drink selection is ample... although there are places with far more selection (I recommend Tapwerks) they have a good amount for a decent prices
If you want a nice place to chill and drink a few brews  and hang with some good friends playing bar trivia check out the 51st st speakeasy!
This place looks like a house on the outside, but the inside looks like a regular ol' bar. Tuesday trivia night is a laugh riot, but prepare to commit 2-2.5 hours of your time. I'm not very good at playing the game, but when you get a good group together, it's a load of fun! Arrive early (half our or so before game time) to secure a table.
You can park in the back of the building. Just follow the Forward Foods sign! If you're coming late at night Don't quote me, but I believe there is a parking lot across the street from the bar that you can park in with no problems. Food wise- I've visited the speakeasy a couple times and they always manage to run out of the food things I want to order. Grrr. Thumbs up for Great Divide beer! Loaded nacho/fries are pretty tasty. The burger is your average burger. Service is pretty spot on. Constantly clearing empty things off the table!
The building is rather inconspicuous, I think! It looked like a home at a glance but facing the street there is a door with "Speakeasy" bannered across it so it isn't impossible to recognize. Most of the parking is around the back where an entrance is as well, but there is also an empty lot across from it that a few people parked in when the back got too crowded. Anywaaay,
When we got there it wasn't busy at all and there were plenty of tables to choose from. Since it wasn't quite yet the busy night-shift there was one bartender that I think was serving both sides of the bar, because he kept walking back and forth. Poor guy.
I am very pleased that they carry Angry Orchard because that cider is the bomb. They also have a large selection of beer, a lot of it local and such.
As for food I ordered the fish and chips (catfish in this case) but they didn't have any catfish. Siiiigh. So I opted for the chicken strips instead. They were alright, nothing exceptional but good for the price. We also got the chips and queso with salsa appetizer and it is not something I'd recommend. The queso was Velvetta, I think and the salsa was... confusing. None of us hated it, but it wasn't great either. It had a weird mushy texture and very little flavor but something about it made us eat it all. I don't understand our motivation, and it frightens me. Then later, I ordered a calamari to split with a friend and they were out of that, too. SIIIIGH. Instead, we got the loaded fries. Another thing I wouldn't really recommend. The fries there are good, no doubt, and the bacon is good as well. I wasn't a fan of the large jalapeno and tomato pieces in it. That was weird.
Service there seemed a little haphazard. I couldn't tell who was a worker and who just liked to steal glasses and plates, haha. But it also gave a laid back feel which I can get behind. You order at the bar for drinks and food and someone will bring the food to you. Someone. It's a surprise every time. They were all friendly, though.
We were there for trivia with The Lost Ogle. Those dudes are pretty cool. One of them got a wee bit tipsy because people kept buying them shots, hah! It was really fun and entertaining though, and quite enjoyable. They were definitely heckling us, which I found amusing. Trivia night is worth a check-out.
Overall: Food is meh, but it's a bar so whatever right?
Go there to drink and hang out and trivia.
P.S. The music is super random and loud. Quality of music? Not bad. But I do hate having to strain my voice to talk.