Since the number of times we assemble is an option of generic authority, the number of times we offer communion is also an option. Seeing that communion is inherently tied to the assembly. We should be impressed that usually we aren't left with only one passage to decide on some teaching of Scripture. The problem with that reasoning is just what we've been talking about. None of the statements or commands about baptism and water ever specify water in motion, running water.
Baptism is specified, water is specified.
Others have argued that our Bible class arrangement is unscriptural because there are no examples of our modern class arrangement in the Scriptures. What we need to realize is that the commands behind congregational benevolence are specific. Money was sent with individuals, but it wasn't sent through another congregation. Therefore, elders cannot oversee the funds that are being used by another congregation.