Airports, train stations and bus depots
Taxicabs
limousines
Sporting events
Hospitals… unless you are applying for a job there
social events… Christmas parties… New Year’s Eve parties… picnics …etc.
Automobiles… either yours or the hiring authority’s… especially while driving
Personal residences… either yours or the hiring authority’s
Anything outdoors.. Parks, etc.
Over the phone
Starbucks
hotel lobbies
The manufacturing plant floor
Restaurants

Anyplace other than a business office is not optimal!