The “colmado” is a thing there in the Dominican Republic. It’s like a corner drugstore or a bodega… basically, what you need, or want, you can get at your local colmado. They deliver. The important thing is that they deliver beer. Really cold, icy, beer. “Bien fria” is the phrase for an icy cold beer. That’s easy Spanish. So, if you find yourself at an Airbnb or some other place here, get the number of your local colmado, and learn the phrase “bien fria” so that you can get your beers delivered. The colmado will deliver anything they have to your home. Even a single egg.
There are colmados on every street, which is hard to tell from my blurry photos out of the car…
For the Dominicans, this is their local pub, bar, local watering hole, hangout, a place where they go after work, on the weekends, to get a “bien fria” and chill. Maybe followed by some dancing. Not your stuffy organized “dahnce” but just the pop-up impromptu salsa that happens because your feel it in your feet, your arms, your soul. The music is in your DNA. And it wants to get down and express itself.
The Dominicans will turn any place into a party, from their local gas station, barber shop, corner store, and so on — into a place to chill with beer and dancing. Not just their colmado.
This may be a class thing… not sure, but I don’t think that the “upper” class hang out at their local colmado… but I could be wrong.
The larger than life Jamaican woman is the event. Sure, go for the ribs and potatoes too. Plus the German beer. But, mainly, it’s a good place to drink and carouse. Carolina, the Jamaican German who owns this place makes this one of those places where you feel welcome. (If you like fancy places, look away now.) 
It’s a self service sort of place, or rather, self order. There are various men and boys, like the baker’s son, who will deliver your food to you, but you order stuff inside. This is a place where the water is the most expensive item on the menu. A lunch plate for two of ribs and potatoes (split open like hot cross buns and soaked in chives and butter), with meatball thrown in, cost around 545 pesos ($10). The potatoes are golden mega-nuggets of comfort. 
Carolina (great name for a lady who serves barbecue) serves grilled ribs, sausages, meatballs, and she sells them too. The addictive potatoes are the accompaniment, and when she remembers, there is sauerkraut. The only sauce is a sweet mustard, unless she remembers to make a chili sauce. When I asked for chili sauce, she brought me the tiniest chili peppers (they were under an inch in size) to chew on. I did. 
The location is on a street off the malecon (coast road): 
You can’t miss it as Carolina will be the LOUD large lady yelling and singing in Spanish, German, and English. She likes to talk dirty and flirt in a big way. If you get there before noon, she may be less racy. May. Be. She does thirsty work so we bought her many a beer and she sat with us, in between bursts of hugging, dancing, or yelling!
Sometimes there is entertainment, other than Carolina, and that will bring about more carousing. Despite this place being “famous” — it doesn’t feel super touristy. Maybe because Anthony Bourdain hasn’t been here.
If I lived here, I would probably be here every Saturday. 
If you want to be enchanted for a an hour or so, visit Los Tres Ojos, early on a Sunday morning. Then only the touts and tour guides will harass you on the surface.
Once you get down into the caves, it will just be you, a turtle, bats, fish, and lots of humidity. Pay the ferryman for the barge ride and enjoy the hidden world on the other side. With the entrance fee (up top) and the ferryman, it’s a cheap hour’s distraction. I think it was 100 pesos and 25 for the ride (2 bucks and 50 cents). Los Tres Ojos is located right off a major highway in Santo Domingo, and ten minute drive from colonial part of town.
There are a lot of stairs…
The taxis here are fairly invisible like Uber or Lyft in the U.S. They have Uber here and that seems to be the most popular. They even have Uber Moto here… Another popular taxi service is Apolo taxi. Every ride seems to only cost between 180-300 pesos (3.8-6 bucks) which is much cheaper than many other chauffeur services. Apolo taxi has an app but when I ordered via phone, they even understand MY Spanish. The dispatcher will tell you how many minutes before the ride arrives, the color, make, and a four digit driver number (not the license plate number). I also ask how much it will cost.