I have used the AA lounges at LAX, JFK (and DFW), the Admirals Club they are called. Spend many many hours in the LAX one over the years actually, know that one quite well (our longest stint was about 7 hours, but we have done a few of that length 4 to 6 hours). There isn't an AA lounge at MCO (well I certainly hope there isn't, we always head straight to the lounge if there is one)
The AA lounge in terminal 4 at LAX has a qantas desk too. You get free wifi, but you have to ask for a card when you check in and the card will give you the passcode to access it.
You only get a free drink voucher for each person

If you want anything substantial to eat you have to buy it. There are some very light snacks available for free, bananas, crackers, etc. We have had dinner off the menu many times before and the purchased food isn't too bad. There is a kids room with games but my DS hasn't used that in the last few years as he's getting a little older now, but when he was younger he liked hanging out in there and there have never been many kids in there. A good spot to go and hide is to go left, when you get in and are looking out at the planes, go right past the bar/food ordering area, around the corner to the left and there is a room with a tv. There are ottermans with really comfy chairs and it's the best place to go and hide and recline in relative peace.
JFK is a nice lounge, I've only been to that one once. Didn't notice a kids area. We had breakfast in there but much of the menu wasn't available

Same thing, you get your free drink card. I didn't ask about the free wifi because I had my trusty virgin mifi thing that I had bought in NY and that was working fine. We weren't there long, only about an hour, it wasn't too busy, clean and comfortable.
DFW if you ever have to stop there, it was miles away from where we were, we felt like we were walking for days

But it was the same deal, free drink card per person, limited snacks, can buy better food.
We have never not been able to get a seat at any of the lounges (with the exception of Honolulu), if you go there

its a Qantas Club and it's the size of my bathroom here at home

(no not really, but it is seriously small, About the size of two hotel rooms, tiny). You should have seen that place back when the flights were leaving around 1am, once it was delayed until about 5am and everybody was trying to sleep, there were no enough chairs in the place for about half the people crammed in, they ran out of food, drinks. Nightmare!
Anyway getting off track with my Hawaii story

But the Admirals lounges are ok, I don't feel they are as good as our lounges here, there certainly isn't the free food selection that there is here, but they are big, bright and comfortable.