I got a really interesting Idea at school, which I'm gonna utilize:
When talking to a fellow worker, you can ask them about their opinion of others

This is mainly a feature for getting to know them and their relationships better.

Another Thing: You can show (or in some cases, give) someone any item in your inventory, and they'll give a reaction to it.
This is either completely pointless, used for sidequests, or for showing Dan that you infact have gotten a lighter.

You can also show someone your precious Sans Card.