I used to really enjoy going to casinos.  Do you know much about casinos?
I know a casino is a facility which houses certain types of gambling activities.
I wonder when the first casinos started.  Do you happen to know?
I know during the 19th century, the term casino came to include puiblic buildings where activities resulting in pleasure took place.
Did casinos originate in America.  Or did it come from another country?
Casino has Italian orgins. It means a small country villa or social house in Italian. So I am guessing Italy.
I see.  Do you know if blackjack and poker came from Italy?
I know in the US, the dealer has two cards. One is face up and the other is face down. So my guess is it started in the US.
I really enjoy blackjack.  I wonder when it originated.  
I thought I answered that already. Blackjack is played with 52 card decks, sometimes it is played with one but sometimes more.