I would recommend just talking with co-workers to determine if anyone hunts, talk to friends and see if people are interested in trying it out, just bring it up in casual conversation and see where it goes.
It might be easier to start with small game if you are going alone, try going after quail, dove, squirrels, you are bound to run into people in the field, just talk with them. See if you can make some new friends and go from there.
If you are interested in bowhunting, spend some time at your local archery ranges and talk with people, practice shooting in their indoor ranges.
In my experience, its not difficult to find people who want to go hunting, but it is difficult to find people that I enjoy hunting with. My .02