Most weekdays from 11 until 1:30, rain or shine, you can find Coney Girl in the heart of Grand Rapids, in front of the new Art Museum (GRAM) on the corner of Monroe Center and Ottawa.
BUT: Don't miss Coney Girl just south of Rosa Parks circle (near Friday's) on Blues on the Mall nights in the summer, at John Ball Park for Monday Jazz nights, and right across from the Van Andel Arena on certain lucky Fridays or Saturdays when it's warm. Look here for announcements of other places she'll be.