Hmm, Christianity shouldn't be individualistic. It should be the community and their relationship to the Divine (you being included in the community). Or if you want a bumper sticker slogan; "Christianity, It's about US not I"
The way I see it, is that when you become saved you're essentially adopted by God into his heavenly family. All people who're "Adopted" become brothers and sisters in Christ's forgiveness. God wants us to look out for one another, and help the broken.
Christianity's all about a personal relationship with the Almighty. Though, being in a group of fellow believers is awesome and all, one must be careful that their beliefs aren't just based on the social event. We're Christians for God, not for mankind.
I've been a Christian almost completely alone for the last 6 years. I can say that the community aspect is by no means essential. Because, community or not, if you die a child of God, you will inherit his kingdom.
On a hardly related note, there's tons of old people in my church. There's only two people my age, and a handful under the age of 40. I suspect that the folks in there are just going to church to "Cash in" on the going-to-heaven bonus. It's an offer one would be foolish to refuse if he or she were close to death. I have no evidence to support my theory though. But in my eyes, it makes sense..
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"having a form of godliness but denying its power. Have nothing to do with them." -2nd Timothy 3:5 NIV
I strongly believe that the sort of people who go through the motions of Godliness for their human peers to see are the bane of Christianity. It hardens people's heart to the true form of Christianity. Gives Christians and God a bad name.