There can always be more events too.
How about hosting an in-person brand/biz hack of the store?
She created vinyl stickers that read "I Wish This Was", under which is a blank white space (resembling the My Name Is stickers common to networking events, etc.). She affixes a grid of the stickers to the building/scaffolding/whatever along with a Sharpie, and folks passing by write their suggestions on the stickers.
For me, what makes her idea so incredible is that the suggestions are made in context; they're not discussed at a town hall meeting miles away from the location, they're not submitted online in a fancy web app, and they're not handed down by local government among suggestions for hundreds of other plots.
It's great that OP is asking on HN, because I think (s)he'll get some great responses here, but the best place to ask might be in the space itself, in the company of the folks that make it more than Some Bookstore In Massachusetts Ripe For a Pivot.
Why not host an event to discuss the future of the store? Send invitations to professors and post flyers for students at local universities and see what happens. It can't hurt, right?