The whole fellowship issue has been propagandized by the Organized Religion promoters, starting with translating a Greek word (ekklesia) that means gathering to mean 'church,' as in a building or a restricted-membership organization of people who meet in the same place all the time; i.e., "Where do you go to church?"
I take Scripture more literally than that and do not believe I have to go through a pastor, a priest, a church or a denomination to get to God and Christ. "Where two or more are gathered in His Name . . ." Therefore, any time Christ is made present between me and another member of the Body, we are fellowshipping.
Practically speaking, I do a great deal of my fellowshipping right here at biblicalfamilies.org, and some of the best fellowshipping imaginable takes place at Biblical Families gatherings. In addition, I have certain individuals in my life who approach their relationships with God and Christ similarly to how I approach mine, so I make sure I get on the phone with those folks on a regular basis, and by regular that can mean weekly or monthly or prn.