I spent some time supporting a single company with mutliple sites; all employees had a card-sized copy of the Quality Policy in our lanyard-worn IDs. There were also posters up.
One (miserable, always-in-quality-trouble) site held an annual dog-and-pony show about the QP, another (smooth running, never-in-trouble) site simply had the QP questions (what is it?, where can you find it?, how do you support it?) come up as part of every internal audit. For that smooth-running site, it was very casual and everything was copacetic. For the other site, we'd occasionally have meltdowns in front of 3rd parties specifically about the QP, partially because that site was far more concerned about the appearance of quality than they were about "doing good stuff all the time."