Korean Spa

Dallas: Spa Castle (bigger) and King Spa
Houston: Spa world and Gangnam Spa
So I have gone to all except King Spa in Dallas.

I will say the Houston spas are good if you're looking to actually relax.

Spa Castle, you will see guys that you want to see. You can get into some action. Especially on the weekend. Spa Castle is a LOT busier than the two in Houston, and it's known as a cruising spot now, so there's plenty of action. Idk about King Spa, I want to assume it would be equally as good because it's in the actual city of Dallas (Spa Castle is in Carrollton), but I've also heard they allow more kids there than Spa Castle does. So idk. But long story short, the only Korean Spa in Texas that you will see/get action is in Dallas.
 
So I have gone to all except King Spa in Dallas.

I will say the Houston spas are good if you're looking to actually relax.

Spa Castle, you will see guys that you want to see. You can get into some action. Especially on the weekend. Spa Castle is a LOT busier than the two in Houston, and it's known as a cruising spot now, so there's plenty of action. Idk about King Spa, I want to assume it would be equally as good because it's in the actual city of Dallas (Spa Castle is in Carrollton), but I've also heard they allow more kids there than Spa Castle does. So idk. But long story short, the only Korean Spa in Texas that you will see/get action is in Dallas.
Adding to this, the ones in Houston are strictly spas. In Dallas, they have co-ed pools and alcohol. So a lot of people go there for that like a day party. Which means more straight guys that use the pool, and then have to shower after in the all-naked area.
So lots more guys to see in Dallas than Houston. Which is surprising to me.