Tout

A tout is any person who solicits business or employment in a persistent and annoying manner (generally equivalent to a solicitor or barker in American English, or a spruiker in Australian English).

An example would be a person who frequents heavily touristed areas and presents himself as a tour guide (particularly towards those who do not speak the local language) but operates on behalf of local bars, restaurants, or hotels, being paid to direct tourists towards certain establishments.