First Birthday Party Location??

My daughter will be turning one in early October, and we live in Washington so it may be kind of chilly. We have a lot of family so having it at our home isn't really an option. We were thinking about renting a room at a pumpkin patch for a couple of hours, but there won't be a ton of kids there, so I'm not sure how that would play out.

Does anyone have any suggestions for a venue in October? Thanks in advance!