I feel like she is outshining me as God's witness and I am concerned because she encourages people to say a prayer to receive salvation. What would you do, Lydia?
You are absolutely right that there are many people in the southern United States who claim to be Christians, but it is more a cultural thing than a true Bible-based faith. Your outgoing club member sounds like she may be more serious about her faith than many southerners.
Please read Acts 18:18-26. Perhaps she is someone like Apollos, who needs to study about what the Bible has to say about baptism into Christ for the forgiveness of sins and to receive the Holy Spirit. Then again, perhaps she is confident in her own teachings and is not open to further instructions. Either way, the only way you will find out is to become her friend. Priscilla and Aquila invited Apollos into their home and explained to him the way of God more adequately. I would see if she is open to your friendship and reading the Bible with you. Apollos was humble and open to their teaching and was later heralded for his effective evangelism and fidelity to Christ. We can pray that is your club member's heart.
Secondly, I will tell you that most southerners are used to "religious speak" from each other. We, as disciples, need to remember that speech alone is not what reveals our hearts as followers of Christ. In John 13:35, Jesus tells us that others will know we are Christians by our love for one another. I encourage you to get to know the other club members. Be a friend that loves with a I Corinthians 13 kind of love, with patience, kindness, humility...not self-centered and so forth. That kind of deep friendship will shine much brighter than superficial religious words spoken to a crowd.
Finally, you are where you are for a reason. I live in the South also, in a metropolitan area. There are many, many people here who are not saved. Like the weeping prophet, I mourn for the women of my city. I believe that the enemy, through worldliness, drugs, alcohol, and false teachings is devouring the women of my city and their children. I am a quiet woman also. But my hatred for the enemy and my love for Christ and others compel me to speak. Pray for wisdom and for God to speak through you...and he will.
Grace to you and the fellowship of the Holy Spirit be with you.