3 nights in Warsaw?

I'm stopping by Warsaw this December on my way home to the U.S.
I was thinking about staying three nights, during the week.
Is three nights long enough to have a good time in Warsaw? Also, by missing the weekend, will there not be as much to do?

3 nights should be enough. But I'm afraid Warsaw in December isn't vere beautiful to visit...

Any Christmas decorations to see? :)

Merged: Are bored in Warsaw, too?

I am from Warsaw now in London.
Every time when I goes to Warsaw I feel like, there is no places to go, streets are dead on Saturdays eve, its like death place...what you guys would recommend to me when I go there:-) Don't forget I know Warsaw pretty well!

go to the centrum or stare miasto man. there is plenty going on but you actually have to go out.

Go to Organza at 4pm and stay there until they chuck you out. Worked for me.