What tag question is correct to be used with "let's not ..."?

Question

for example: let's go to the movies, shall we?
but what about "let's not go to the movies,...?"

Answer 1

"Let's not go to the movies, shall we?" is the correct tag, although this really isn't a 'tag' in the usual sense as it not a declarative statement but an imperative.

Answer 2

Lets wait until it comes to video, because going to the movies is just expensive anymore and if the movie is a let down, I won't feel so bad for spending a butt load at the theatres to see it.