If you want a name but not an account, you can just use the Temporary Name.
You can use temporary name by:
- Click "Set Name" that you can see to a chatango group.
- Find the "Temporary Name" once you have clicked the "Set Name".
- Type any name (any name is always available).
Actually, you can use any name but it musn't have spaces and etc.
If you don't know any groups, you can go to http://chatango-tips-and-tricks.blogspot.com/ to find some chatango group.