I will try to listen (or their parents)what they really want to learn initial.
If they have no idea.I will use the lesson or guide from company.
If no ,i will use below format.

For Children,

It is the basic to learn how to greeting in our normal living. (it should take half an hours lesson)
From 1-100
We can understand every color in rainbow etc....

We will talk about how will we read the menu and order in restaurant.Also share the food culture and funny history.
For example" how they make noodles with bare hand? "

Understand the culture should be very important.

For Adult,

We will talk all about culture but more penetrate pecially how to catch the Chinese speaker attention easier.
It is not language is unique language of learning y to learn but hard to proficient.
Or i will design funnier different task "No more embarrass to order in restaurant with your Chinese girl friend !" "How to make a new friend and give them great impression rapidly in Chinese society ?"

As i also learn foreign language may be easier lost control to pull them back from Adult Topic.
For the company reputation ,I will try to cease 'porn and foul language "
Except the students are strongly request and the permission of company acceptance.
I will try to share also a part of culture in Chinese.
If they really living in Chinese speaking circumstance .They should know if someone are really angry why they scolding with foul language.