A bar mitzvah is not performed. A Jewish boy becomes bar mitzvah at age 13, regardless of whether there is any ceremony. (The term for a girl is bat mitzvah.) At this age, a boy is, in the Jewish tradition, considered to be responsible for his own actions and able to be counted toward a minyan (the quorum of 10 required to hold public prayers) and to lead public prayers. It's traditional to hold a party to celebrate this, starting with a service in which the new young man actually leads some of the prayers to demonstrate that he is ready to take on this obligation. A party follows, and by the middle ages, there were rabbis who said it was worthy of the same kind of celebration you'd hold for a wedding.
Yes.
Yes.
Yes people still held bar mitzvahs in the ghetto but they were very small and secretive so they wouldn't get caught.
Bar mitzvahs are held at synagogues.
Absolutely! Bat Mitzvahs are FAMILY events.
Absolutely! Bar Mitzvahs are FAMILY events.
Shabbat morning is customary, because the Torah is read at that time, and because more people come to the synagogue.
No
Everywhere
The food has to be kosher.
They're celebrated with parties after the ceremony.
Yes; bat mitzvah is for girls.