Is there something to worship? Will we have cake stalls and car boot sales? Raise money for charity? Congratulate ourselves on our faithlessness? Or just have regular piss-ups?
I know conventional churches do more than just worship invisible beings but that is meant to be their main purpose.
I definitely wouldn't want to call it a church ffs. This sounds like the sort of thing accomodationists would set up in order to try to camouflage their atheism. "Oh yes I go to church regularly, the church of Ceiling Cat" or some nonsense like that. It smacks of loss of backbone to me.
If you want to join a group of like-minded people by all means do so but for gods' sake don't call it a church!!