What would one encounter at a Buddhist temple service?

With the understanding that there are many different traditions and cultures within Buddhism, I wonder if it is possible to describe what a newcomer might encounter if they went to a temple service and also what might be some handy things to know about before going. For example, what is considered appropriate attire? Should one bring an offering and if so, what type? What occurs during the service? Chanting? Meditation? How long does a service usually last? Other than common courtesy, are there things that would be important to know to show proper respect? Thanks and also it would be helpful if tradition/country might be noted along with any descriptions.