If you have a free hotel room can you get a sweet or is there an upcharge?

I believe it is an upcharge of 80 dollars

It depends on the day of the week, in the middle of the week they might just upgrade you to a suite, I've done it many times, just ask.

That would depend on the free room comp. Most likely if it doesn't specify anything, it's for a standard room that you can upcharge.

There's an up charge

It would be a upgrade and cost you more

For this you will have to ask the casino hotel or passport club if this is possible