'Assembly' in the Bible

I commend to you Phoebe, our sister, who is a servant of the assembly that is at Cenchreae,

Greet the assembly that is in their house. Greet Epaenetus, my beloved, who is the first fruits of Achaia to Christ.

Gaius, my host and host of the whole assembly, greets you. Erastus, the treasurer of the city, greets you, as does Quartus, the brother.