Don't screw with the baseline

Every social situation has a baseline series of expectations.

In an interview at a bank, you're expected to dress formally. On a first date, you're expected to have showered recently.

These expectations are often unstated and sometimes highly nuanced (for example, swearing is acceptable at some companies and shunned at others) -- but when you want something, to the best of your knowledge, don't screw with the baseline.

Breaking social expectations  is a simple and easy out for someone to say no to you. Don't give them that opportunity.