Crickey Mate!!

:confused Hey all, I have alot to ask....if you could respond with some links I would be STOKED!!
I am buying an internet cafe with 50 client computers. Installing SMART LAUNCH to manage all accounts/usage/security.
It is a gaming lounge and I want to know the best way to set up all the games on all 50 client computers. I'm sure there are lots of ways of doing it, but basically I don't want my staff to have MOVE to enter codes or insert disks or ANYTHING!!.... just want the customers to walk in, sit down and click on the game they want to play and it starts!! FAST WITH NO LAG.
I have STEAM accounts but we are using non STEAM games like WOW, C&C, and so on... Also, we will be ghosting our PC's so any info, guidance or help much appreciated..
ANY detailed replies and links are welcome....I have my work cut out for me for sure I know!!!
Thanks in advance, Dave @ Red Lantern Gaming Lounge New Zealand