I'm a literacy coach/reading spec at my school, so I don't really have a room :). Many of our teachers do have the menu posted, but then they don't have Daily 3 Math posted, so I can understand your thinking.
Certainly you could just put the writing menu in their writing folders, and refer to it while you are conferring rather than posting, if that would work for you. One of our teachers made a "poster-board" sized writing menu with all the strategies on it, and uses a piece of highlighter transparency to showcase the specific strategy for the mini-lessons she's teaching.
I think you just have to make it work for you!!