Yes, but their shortened form is MAAC, not Metro. The former major conference had "Metro" in their logo and was what the conference was known by, but it was short for some awfully long name people don't remember. I like the idea of using metropolitan in the name of the conference, it makes sense, but just using some simple name like Metro Conference could be trouble. That's all I'm saying, not that the word metropolitan cannot be used.
Cosmopolitan is a synonym for both metropolitan and catholic (not Catholic), how about Cosmopolitan Conference.