SP: As per uslegal.com definitions, an office A public place is generally an indoor or outdoor area, whether privately or publicly owned, to which the public have access by right or by invitation, expressed or implied, whether by payment of money or not, but not a place when used exclusively by one or more individuals for a private gathering or other personal purpose. The following is an example of a state law defining public places for smoking laws:
You can read more here:
http://definitions.uslegal.com/p/public-place/