I was in Terminal 4 yesterday. Two lounges airside. They're the original Mera Lounges. The large Business lounge is called the VIP Lounge and does not accept priority pass, $29. I believe it is the same as the lounge in Terminal 3.

The other lounge "The Lounge" is the smaller lounge and since it's the only priority pass lounge in Terminal 4, it was swarming with people. The other lounge was crowded too, but nothing like the smaller one. It was very uncomfortable to sit in there and eat/drink with no social distancing and nobody wearing masks and hot and stuffy. So, I got two ham sandwiches and a beer and left ASAP.

They had tacos, sandwiches, salad plates and some other stuff that I couldn't quite see, but they do have a variety of beers and a bar for liquor. But if it's crowded like that it's best to buy some food at a restaurant and find a place to eat it. Or find a restaurant that's not so crowded. I would do exactly that next time if it's crowded like that.

The entire terminal was very crowded too. Maybe it's different other days of the week or other times if the day. I was there about 4pm Thursday.