Group chat are very common in Facebook now but for some people it's become the reason of distraction and getting too many emails and chat notification.
If you are one of them here is a simple way to Opt out of Facebook Group Chat.
Step 1. Go to homepage of Facebook Account.
Step 2. Click on the group (At the left) which you wish to opt out.
Step 3. Click on 'Edit Settings' Button at the right top.
Step 4. Update notification and other settings as per requirement.
Step 5. Click "Save Setting" and you are don.

If you are one of them here is a simple way to Opt out of Facebook Group Chat.
Step 1. Go to homepage of Facebook Account.

Step 3. Click on 'Edit Settings' Button at the right top.
Step 4. Update notification and other settings as per requirement.
Step 5. Click "Save Setting" and you are don.