Yes there are Casinos, none in Denver.
There are three Mountain Towns that have Casino gambling.
Central City, Black Hawk, & Cripple Creek. These are old Mining Towns. They are still getting a lot of Gold out of a Mine in Cripple Creek. Don't worry about seeing it. You can't get in.
Central City & Black Hawk are on about 30-40 miles from Denver, if that.
I don't exactly know where you are from but If you enjoy windy Mountain roads by a River take the Canyon from Golden. I-70 will take you by the Buffalo herd and after a long hill you may see the Buffalo & a beautiful Snow covered mountain range. It has Snow all year long. Please don't tell the Global warming Group, they will be disappointed. On the right side I believe is Arapahoe Glacier??
The wise thing to do is take I-70 to the Central City Parkway & take the Canyon back down the hill..
It can get Cold in the Mountains at night. Take a light Jacket. It's all about Altitude. The Higher, the Colder..
You relatives will know the way.
Have Fun & if you wish please give me a Call. Maybe we can get together. I live in Littleton.
Please send me a P.M. & I will give you my Number.
Richard