<p>Howard is co-ed and not in Atlanta. (You may be thinking of Morehouse.)</p>
<p>Of course, HBCUs may not necessarily be that “diverse” in terms of students of non-black racial or ethnic groups. For some reason, many non-black people don’t seem to want to attend them, even if they are otherwise appropriate academically, financially, etc. (perhaps for the same reason the OP does not want to attend a 70% white school).</p>
<p>Community colleges will have students representing the diversity or lack thereof in the local area.</p>