@irontoenail - In the case of adults, I think it's so important to establish trust between all the students and the teacher. Teaching English when you're in an English speaking country should never be just about learning in a classroom. You can take them on field-trips just by walking down the street or going to the supermarket.
Another thing I want to point out is to keep in mind that your teaching methods should match the goals of the learners. If they just want to be able to communicate with their neighbors, then stick to conversational English and don't be too pedantic about the finer points of grammar.
If they want to know business English or English for a particular environment (like a job) then you're going to have to be more of a stickler and probably go more deeply into cultural expectations as well.