Why "instead"? Most Christians do both.
The Bible says to fellowship with other Christians. And we go to Church not for what it can do for us but for what we can do for it. God desires corporate worship. How are you going to know the needs and situation of other Christians if you don't fellowship with them on a regular basis? Finally, Church offers the most best opportunites to learn about and engage in organized charitable events and causes, and to support missionary outreach.