Your feelings would not be invalid in feeling that. They'd be mainly accurate.
This sort of marketing effort has been common in the internet era, dating all the way back to the late 1990s/early 2000s. My guess is that similar pictures were in local magazines in the 1970s and 1980s. Bars have always had the reputation of having excess males.
I have an example to illustrate the last sentence.
One thing that I have noticed in my time in Dallas is that there are a few examples of larger, commercialized pool parties. often with DJs connected to a business (bar/restaurant, hotel) with hundreds of semi-strangers attending. In my experience, these type of pool parties tend to be bigger sausage fests and don't usually live up to the hype as a pickup option.
Plenty of couples meet at bars. See chart below. Yes, there's been a bit of a stigma surrounding it.
In the 1990s until the mid-2000s, there was a HUGE stigma against meeting someone on a dating website. That more or less died off by the end of the 2000s. The stigma in that era of meeting someone on a website was way worse than at a bar.
That's good for you from a health point of view. People that don't drink alcohol have a much more difficult time navigating the early stages of dating. It's possible to avoid bars as a pickup option. There are swipe apps (bad choice) and non-bar approaching (better choice, but still a difficult path). Even if one skips the bars as an initial interaction point, where is that person going to host the first date? Dinner dates in restaurants and coffee shops are both worse choices than a bar or lounge. It's more difficult to coordinate a good activity date on a weeknight. Activity dates seem to work best on weekend afternoons.
I've had the same observation before when I've been out.
@Jesse Pinkman has noticed this has happened in certain New York City venues.
If a woman is part of a group of more than 3, she is not serious about meeting men. You have two examples below of groups of 2 and 3. That might be an option. I have rolled solo at night and done approaches before. It's not that big of a deal. No woman ever questioned me about why I was rolling solo. With that said, it's not ideal. I do recommend use of a wingman in night approaching. I've never had a great wingman option. Two unattached guys going out and doing approaches can work, but often fails more than it succeeds for a variety of reasons. I've gone out unattached and done approaches with a guy in a relationship/engaged before. Often times, those guys can be dull. They might even be too dull to occupy the friends of the main target.
This is why I prefer and have been prefereed non-bar approaching for a long time, as I don't have to deal with that shiit. And I can also do it earlier in the day.
I can imagine those types of interactions happening. They are probably more common than uncommon. They are unpleasant for the approacher even if the women are not flat out rude. Most women won't be flat out rude, but many will find an excuse to end to interaction or freeze you out with non-verbals.
That is astounding. As a 6'4" man with big muscles, you should be the prize these women seek. You should be the one in control of the interaction and in demand. You should have your pick of the women.