I like what Jim Davis has written about Christian fellowship:
Church attendance is often substituted for fellowship. To some fellowship is like a jar full of marbles. The marbles are in the same jar but there is little togetherness. The marbles have little effect on each other as they roll around in a jar. They just bump into one another. But real fellowship is more like a jar of grapes that bleed on one another. Fellowship should allow our faith to rub off on one another. The first believers had real spiritual needs that led them into fellowship with others. As they came into this fellowship of other believers with the same needs, they naturally bled on one another.
Too often church attendance turns us into iceberg Christians where we just float around and bump into one another. One fellow visited a church and gave his description of those in attendance. He said, "I don't want to say that it was a cold church, but the ushers had on ice skates." The first fellowship meeting had little to do with church attendance and everything to do with togetherness.