@boredsouls: HAHAHAH!!! I have to laugh. Your husband was mugged by individuals who happen to be black and he’s afraid of ALL black people. I’m guessing that your black coworkers are NOT the individuals who mugged him…so what do they have to do with your husband being mugged.
The fact that you work in the “outside” world means that you are mature enough to make the right decision. If any of your co-workers whether black, white, hispanic, etc. is a supervisor/manager/boss POLITICALLY you SHOULD invite them.
I’m getting married G-d willing in February and can’t invite the whole office. I work with both Jews and non-Jews. I hung up our invitation where EVERYONE can see it. All are invited to the Kabalat Panim and Chuppah. They will get the hint that they are NOT invited to the sit down meal when they DO NOT see a place card with their names on it.
Just remember NOT to cause a Chillul Hashem.
If your Chattan doesn’t like you working in a company with folks outside the tribe then perhaps he can get another job.