The problem with Yes Man, while quite entertaining, is that it's rather weak as far as storytelling goes. We have the premise that Jim Carrey is a shut in who changes his life around by saying Yes instead of No to opportunities that arise. So from where does the conflict in the movie come? Well, there isn't much of any outside what is completely shoehorned in the final acts composed of the seemingly random events that dot the movie strung together rather weakly.
That said, it's at least Jim Carrey being funny again, what I feel he's most at home with. And I do think his character develops believably out of his original shell by exploring how an optimistic disposition can change one's life in general. Worth Netflixing at least, but by far not his strongest movie.
If you felt Mr. Terrence's group seemed cultish, the writers are probably pleased.
And how come I know no bars that have DDR machines? Drunk adults DDRing is a great idea/lawsuit/fortune waiting to happen.