In the last year before she died, my mother started attending a local Lutheran church. I suspect one of the reasons was to keep her children off her back, as we were expressing concern about her living on her own. I mentioned that she would get more social interaction in a senior's care facility and so on. So she launched out and found a social group on her own.
We had a service for her at the church, and I specifically asked for a church potluck, which I think is one of the highlights. It was nice to see that there were people who missed mom and knew her in her last year. One of the congregation members discreetly watched out for me and made sure I was taken care of. That was very nice.
http://www.frtommylane.com/stories/next_life/keep_the_fork.htm
I also attend a church regularly and for me it is tying in to the community, seeing the same faces every week, and the singing. There are people checking in on me and asking how I am doing on a regular basis. It is comforting. And I do love to sing.
That all being said, only go when you feel like it and there is no obligation to continue.