I just posted this on another thread about Celebrate Recovery:
I credit CR for getting me through some of my darkest days. It varies a lot depending on how large the church and program are. There is a large service where there are songs, a testimony or a lesson. From there, small groups break out according to your issue. Men w/men, women w/women, according to what you are there for. I was there for support for codependency. There is usually a chemical dependency and a sort of etc. category as well.
Expect them to welcome you, and not to pressure you. Many have a meal you can go to, and a dessert after where you can gather and talk, etc.
I have found my biggest supporters at CR, it is a wonderful program. I encourage anyone who needs some help to reach out to CR.