Trying out a hiking alternative. Lagunitas Brewery (Petaluma) is dog-friendly and has an outdoor picnic area where one can sit and chat with their canine friends. I will have a sign with the Meetup info at the picnic table.
I will do more in the future as I research breweries/wineries that are dog-friendly. If this sounds awesome to you, but the date conflicts, let me know in the comments so I can work around it in the future.
Start time will be 12 pm, since the Brewery opens at 11:30 am on the weekend.