Bachelor Nite

A bachelor party also known as a stag party, stag night or stag do is a party held for a man shortly before he enters marriage, to celebrate his "last night of freedom" or merely to spend time with his male friends, who are often at his wedding party afterwards. A bachelor party is usually planned by the best man or other friends of the groom, occasionally, with the assistance of a bachelor party planning company.
A bachelor party may involve activities beyond the usual party and social gathering ingredients (often drinking alcohol) and hazing-like tests and pranks at the groom's expense, performed as a rite of passage from bachelorhood (associated with an adolescent lifestyle, often in the common past of most participants, e.g. in their student years) to the "more responsible" marital life.
The task of organizing a bachelor party is often traditionally assigned to a male sibling of the bachelor or to the best man. Otherwise, any male friend will organize it. The planned activities of a bachelor party are traditionally kept secret from the groom.