How many people were at the emancipation proclamation meeting?

The Emancipation Proclamation was not a single meeting but rather a significant policy announcement made by President Abraham Lincoln on January 1, 1863. It was a response to the Civil War rather than a gathering of people. However, discussions and deliberations about the proclamation took place in various meetings involving Lincoln, his cabinet, and advisors, but specific attendance numbers for those meetings are not well-documented.