Let's have a social gathering!

To be honest we all like to have people around us or spend some time with our friends and families, don't we?
In this case I made a drawing to create a confusing social gathering. The atmosphere is fulfilled with different emotions and apparently not everybody seems to enjoy the moment.

What are your guesses about:

How many characters participating in the scene?
What is the reason for the gathering?
How are the characters related to each other?

Looking forward to read some creative thoughts!

Best regards,
Yannick