Yes.
Act 19:8 And he went into the synagogue, and spake boldly for the space of three months, disputing and persuading the things concerning the kingdom of God.
Act 19:9 But when divers were hardened, and believed not, but spake evil of that way before the multitude, he departed from them, and separated the disciples, disputing daily in the school of one Tyrannus.
This group is very odd.
Funny how I had the same feeling, but the other way around...
The group in Act 19 WERE believers and then they renounced their faith, big difference.