Checking Server for website traffic?

Hey there,
At the office I work at- we have a big ol’ win2k server in the back hosting tons of stuff for our little department. While I usually strear clear of it, I was asked if I can check the number of hits on a certain website being hosted there.

While I can set up google webmaster- to check in the future- is there a way to check traffic without doing so? Is there an already set up method to see traffic?

Thanks