Christian fellowship is a common part of regular church practise, starting in Acts 2:42 already.
And they devoted themselves to the apostles’ teaching and the fellowship, to the breaking of bread and the prayers
Christian fellowship is different to Christian socialising. Christians socialise easily, but fellowship takes some work. Christian fellowship is the sharing of spirituality based on the shared salvation in Christ that Christians have been given. Consider the following tasks of Christian fellowship:
- Do extra good to one another when you have the opportunity (Galatians 6:10)
- Share the pursuit of holiness with one another (Hebrews 3:12-14)
- Be a contributor, not a hindrance, to peace in the church (2 Corinthians 13:11)
- Respond to the physical needs of believers as though it were Jesus with the physical need (Matthew 25:34-40)
- Use your earthly possessions to accomodate Christians for the sake of loving service (1 Peter 4:9-10)
More can be added, but this lists is a good kick-start to true Christian fellowship.
Philippians 1:9-11 lists the fruit of Christian fellowship as a greater love, better knowledge, increased discernment, holier actions, greater readiness for Jesus’ coming; clearer evidence of God at work; and more success at making God’s greatness known.