This question, in my opinion, seems to be concerned with parallelism. I would definitely consider parallelism as part of grammar. The comments are being needlessly specific.
First of all, I don't think anyone says "on first date". People usually say "on first dates" or "on the first date".
During job interviews , ON FIRST DATES , and when meeting new coworkers
It is possible to say:
- During job interviews, first dates, and personal introductions
- During a job interview, a first date, and a personal introduction
- When getting interviewed for a job, going on a first date, and meeting new coworkers