2X2 Meet/Outings

Is there any significance to the "2X2" name tag given to the meet/outings referenced on the Portal page and in other places through the forums? Is it okay to bring the "better half" or a friend/fellow photographer?
A discussion forum - and more - for users of Digital Single Lens Reflex cameras.
https://www.dslrusers.com/
surenj wrote:Yes, you can bring others as long as they will behave themselves....