I am asking for a friend. The situation will take place in northern Europe should this matter.
My friend is a manager in a multinational company and manages team of ~15 people. He has hired a high-skilled and ambitious software engineer who'll start working on his team in a few days. The new hire identifies as bi-gender. My friend throughout his career has only managed cis-gender people so he has no experience working alongside a bi-gender person. This is stressing him out because he would like to avoid any gender issues in his office.
He would like to prepare the team members as well as possible and at the same time he would like a new person to feel welcomed in the office. Therefore he seeks for a hints how to manage this person but he also has some specific questions:
Is it professional to ask the new hire's preferred pronoun ("he/she/...")? If it is not, what pronoun should the manager use when talking about the new hire? The official language in the office is English.
The toilets in the company for a women and men are on a different sides of the hallway. When giving the tour through the office which toilets/bathroom should he show to the new hire? Or would it be the best to arrange a new toilet and showers room for "other genders"?
Some after-the-work events in the company are only for a specific gender (i.e. "Geek Girls Night"). Should the new hire be invited to this kind of events?