I know you ladies will have the right answers for me (which I'm guessing will be I'm not a special snowflake, but I could be wrong!)
Inviting some but not all coworkers: FI and I both work for my family's business. About a third of the employees are my family members and will be invited. The rest are non-family members. FI works in sales, and there are 7 other guys in the department, but he is only close with 4 of them (one is his manager) and wants to invite them but not the other 3, and ask those 4 guys to keep it on the DL. Can we invite only those 4 guys, or is it all or nothing? In case it matters, we would not be inviting any other employees (besides family).