I have non-Jewish guests fairly often (board games are a good way to spend Shabbat afternoon...). Here are some things I do:
Wine: just use mevushal. Why risk either offense or waste? Your human guests are way more important than having the nicest possible wine.
I use a "night light" in each bathroom rather than leaving the regular lights on. It's way ...
There is nothing in the Nazirite vow which gives one special physical strength, and a non-Jew does not become a Nazirite.
Male or female Jews can become nazirites, but non-Jews cannot.
For more details, the source of this rule and the talmudic logic behind it,...