Plenty of Jews today do their fellowshipping in home meetings. The synagogs are for religion and education approved of by the 'authorities'. However, small groups would get together over coffee/food and discuss things in a deeper way, both religious and philosophical. I have had the privilege of attending both synagogs and groups of studious faithful who wanted to go deeper into the scripture and other writings. I have seen the same in Islam. The informal discussions usually have more politics woven in-philosophies of how religous and political issues mesh-or if they truly can and how much compromise is beneficial vs comproMISING.
I have learned a lot more in those discussions-in all three faiths than ever in a synagog, mosque or church. If not always what I agreed with, it always gave me more to study about,think about and pray about-because they were honest conversations, rather than ones meant to please "authority" or follow the party line, so tospeak.