When this is said, it automatically means something's wrong with the church. Though it is not a call to leave the church, one must be aware.
This kind of statement basically says: I don't want to get to know you better as a leader, period. You either serve or get out. If you serve, I will merit you with recognition...or not.
So what's wrong with the church? They do not care about honest fellowship among the saints. Sure, there are friendship networks, helping each other in secular matters. But I am talking about cherishing God's presence, His words, His everything together, not just some social club which even the Buddhists and the Muslims can do better.
Servitude in a church is more than just voluntary. When one serves, one sees it as an opportunity to serve God, oneself, not by persuasion of others. God's works are not for merits.
It is even sinful to ask someone else to "serve God" and assume wrongly that someone believes he/she is serving God. Why? If you do not know, why would you test the Lord? Is not the Holy Spirit the one and only who calls, who moves a soul. So why would you test if you are a co-knower of the Holy Spirit if you aren't sure in the first place?