I was at the local Applebees in Ankeny the other evening. It is a favorite place of mine. The food is good but not the reason I go there. I go there because of the staff. The staff they have stays long term because of the culture. The general manager is one of the hardest working people in the place. He never stops moving. He is the first to wipe down a table or sweep up the floor. He treats his employees as equals.
I see a similar attitude in the staff of HyVee. I recently was checked out by a manager at my local HyVee because her staff were already helping others. She opened a lane and checked me out. I did not have to ask or encourage her. You could tell that it is just the way they do business.
The actions of you and your staff are what we customers use in understanding your culture. If you own a restaurant where the tables are filthy and the manager is leaning against the bar talking to the hostess, I know your culture.
I personally do not like spending a lot of time talking to my teams about culture. I believe you simply model the behavior you expect of everyone else. Those who can emulate your model are the ones you keep and reward. Those who do not need to leave.
Make sure you are modeling the culture you expect from your employees at all times. It is the strongest form of communications you possess.