On the 100th anniversary of Prohibition, step inside the iconic NYC speakeasy that's hidden in an unmarked brownstone just steps away from the bustle of Times Square

Bradley Cooper was photographed at the bar back in 2014.

Bar Centrale is behind an unmarked door in a brownstone that looks like any other brownstone. If I hadn't seen a photo of the door (thanks, Google Maps) and been looking carefully, I would have walked right past it.

I got there early — a little after 5 p.m. — because I'd heard it can be tricky to get in at peak times without a reservation. I didn't have a reservation.

As I walked up the steps to the unmarked wooden door, I could see people drinking inside through the blinds on the windows. But if I didn't know this was a bar, I wouldn't have noticed.

There were at least 10 patrons already at the bar, even though it was barely 5 p.m.

A hostess with short blonde hair, red lipstick, and chic wide-legged blue pants greeted me immediately. As I was a party of one, she told me she could seat me at the bar.

I was no more than ten feet away from the patrons sitting across from me, and the bartender chatted casually with the customers.

He talked with one patron about Elizabeth Taylor; one of her black-and-white movies was playing silently on a small screen above the bar.

Other staff members chatted about Broadway shows they'd recently seen.

After a brief moment of panic when the bartender asked if I wanted it "up" or "on the rocks," (what does "up" mean again?), my cocktail was served to me in a glass. It came with a small pitcher on the side that contained the rest of the drink nestled in a cup full of ice to keep it chilled.

The Negroni was $17, which — even by NYC standards — is certainly pricey, but it tasted great, and I appreciated that I didn't have to worry about it getting warm if I drank slowly.

Bottles of wine at Bar Centrale range from $45 to $123.

And Bar Centrale has some strict rules to maintain this vibe.

There's a strict no standing policy, and the bar can't accommodate parties larger than six people "due to [its] small size and intimate atmosphere," according to the website.

The crowd appeared to be upper-class and not particularly diverse, with many people wearing crisp button-up shirts and slacks, dresses, and turtleneck sweaters — but the space didn't feel pretentious.

It wouldn't feel as much like a "hidden gem," which is what people are looking for in a modern speakeasy — or at least what I look for.

I want it to feel like an undiscovered, secret sanctuary — even if it has more than 180 public Google reviews and opened 15 years ago instead of 100. For me, Bar Centrale, a hidden respite from the madness and bright lights from Times Square, fit that bill.