There's an effort underway to form a real downtown association. Currently several groups claim to represent downtown, notably the Salem Main Street Association.
But as I've written about several times, that association -- referred to in Salem Cherry Pits as the Salem Lame Street Association -- in no way represents downtown businesses and property owners. See:
The board of the Salem Main Street Association is self-selected, so isn't elected by downtown businesses and owners. Also, it was mistakenly organized as a 501(c)(3) organization, rather than a 501(c)(6) organization, which, as you can read below, is what the real downtown association would be.
Hopefully a genuine downtown association will come to be before too long, since businesses and property owners in Salem's urban core need to speak with a single voice when issues arise that demand such.
Here's a scan of the page in the May Salem Cherry Pits that has the downtown association article.