This is how I know I'm in Las Vegas.

The ATM minimum is 200 dollars, going right up to 2k, and yet whenever I get change they give me 1 dollar bills.
Everything I own now smells faintly of cigarettes.
I've not seen the sky for 48 hours. I've stopped looking at my watch; time is meaningless, everything is open 24 hours.
I think I had six desserts yesterday.
I feel amazingly stylish which is new for me.
I have an astonishing looking hot tub in my room which I cannot bring myself to use. It has many nozzles. I'm worried that what happens in Vegas may have happened in my hot tub.
I'm genuinely looking forward to my 11 hour flight home.