Cool to bring a blind-but-not-blind date?

What's up people. So my coworker has a new roommate and thinks me and her would get along well since we have similar interests and are the same age. Obvuously, both of us have never met each other but only know from my coworker (the go-betweener).

My workplace has a holiday dinner planned and what I want to know is, would it be weird or fine to invite this "unknown" girl to it as my date. I'm pretty close with this coworker so I can casually bring it up and see if her roomate would want to go (and try to get a phone number/facebook). hope that wasn't confusing, thanks all!!
Cool to bring a blind-but-not-blind date?
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