What Grim said. If you have a main character that works in or is connected to the fields of Science, Technology, Engineering, and Mathematics, it qualifies.
You weren't the only one who had to ask. I don't know if it helps get around your issue with accessing discussion rooms but here's a URL to click in case it's just the booklikes menu fail:
The official answer to my question on clarification of STEM: "1. Science, Technology, Engineering, and Mathematics."
http://booklikes.com/groups
And directly to the booklikes-opoly Q&A thread is:
http://booklikes.com/thread/3008/booklikes-opoly-q-a