I have been to the Rattlesnake Bar at the Ritz Carlton in Dallas. It's not a great pickup spot. When I went once on a Saturday night, I was around 30 and most of that audience is 40+. Over the years, I have also been to a few organized events there, but none in many years. As
@BadBoy89 says, only younger women matter and younger women aren't really at that bar. There are some more affluent 40 something women seeking 55+, older rich guys there. It can be entertaining people watching.
I've not been to Lounge 31 either. It's in Highland Park. Highland Park and University Park are richer, generally married. Might be good for people watching, doesn't sounds like an ideal place for approaches. It's a sushi restaurant. It's possible some unmarried couples might go on a dinner date there.
There are some interesting names on that list in terms of places.
Klyde Warren Park and Katy Trail can be decent daygame spots but every daygamer in Dallas already knows those spots. Both are game saturated. With that said, there aren't many daygamers in general as most men not comfortable starting interactions in a non-bar venue without alcohol.
Northpark Center and Galleria Dallas are malls and malls draw all walks of life. I've daygamed both of those malls over time. I like Northpark better for daygame because it is closer to the areas where more unmarried, childless, and younger people tend to live. If you want to find a boujee White 25-35 year old who is childless, that's more likely in Northpark than Galleria Dallas. Galleria Dallas is likely a better spot for approaching some Hispanic women but I wouldn't call it a hub of Hispanic women.
Galleria Dallas' ice skating rink on the bottom floor can be a decent date night idea if you are able to skate and if you're able to plan it on a night where it won't be overcrowded with families with children.