Paul does refer to the gathered church in 1 Corinthians 14. But here are a few observations to keep in mind. First, most of the churches Paul was writing to were much smaller groups than many of our churches today. Many would have been the size of large “small groups” to us. Second, we can tell from 1 Corinthians 14:26 that the way these churches structured their worship gatherings was different than the programmatic ways many of our churches structure our gatherings today. Third, nowhere in the New Testament is prophecy prohibited outside of corporate worship — Paul was addressing the specific context of the Corinthian church and we shouldn’t read more into the text than is there. And fourth, as I mentioned in the answer to the first question above, numerous New Testament prophetic messages were delivered in contexts outside of what we might call a church worship service.