A$ use limitations, some info?

You can use it for whatever you want. Buying membership, clothes, poses, rooms, gifting. Just if you want to add your own pic to game you have to buy A$ with real money (like your subscription, you can't take money you have gotten as gift).
Does it answer your question?

We could play – if we use it here or in game. You can't use it on other websites of course. Do you have a special idea?

Achat does have a Naked Poker room now but

In Naked Poker – YOU CANNOT WIN OR LOSE MONEY IN THIS GAME. THE POKER IS PLAYED JUST FOR FUN AND ENTERTAINMENT
You are allocated $1,000 game money to start playing with. In the room, you can win and raise you playing money but when you leave the room, you leave with no losses and no wins. You leave empty handed.
It is just another room to meet and greet new people while playing poker. You are sitting at a large table , big enough for 10 people.
Seated positions taken at the table are random. Poker starts with 2 or more players.

The game money stays in the room. You neither win or gain anything outside the room.
There is a league board to see game positions.

While playing poker, your show as yellow outside in the lobby.

You gain access by clicking the Naked Poker tile in the Achat Mall on Log in.