Maggie's is where everyone seems to meet up, whether intentionally or not, and is a big source of the town gossip. Maggie's is also where everyone gets their horse feed, horse tack, equestrian clothes, horse lunch, a cup of horse coffee, or a slice of pie (for your horse).
This was the location of Lou and Peter's first blind date after they began an online correspondence.
In episode 3 of Season 7, Maggie's was put up for sale and that sparked a competition between Lou and Tim over the sentiments of Maggie's having been in Hudson since 1902 and Tim's insatiable need to own a Buff Burgers franchise. Lou had initially wanted to have the building made a historical building but backed out due to the strain it caused on her and Peter's marriage, but Mallory then took Lou's work and spoke to the town mayor.