Go to the Human resource department of any casino and you will have a food service job in 24 hours. You need a gaming card and a health card which will take a few hours.
Yeah, If you don't mind working the overnight in the coffee shop. If you want in to a "Fine Dining" room you have to know someone or put your time in (6 months to 1 year) and transfer in-house.
You need a Non-gaming sheriff's card, Tam (alcohol) and health card. Costs about $150 total. Sheriff's card takes about 3-5 hours,Tam you need to take a class and health card is pretty easy to get.
I know someone mentioned bartending. You really have to know someone to get a casino bartending job. Otherwise it will be at least 1 year of bar-backing.
If you can keep any bad habits in check you can make a good living out there as a server. I managed and served out there and would definitely be a server over mgmt(Better money and less headaches).