September is when students flood the cities and take all the part time jobs, so you may do better another time of year. OTOH, there are always wait-staff, line chef and dishwashing jobs to be had in restaurants. It's not like you are looking for career experience. There are also temporary employment agencies, where you can get day-labour.
Do you live in a Commonwealth nation? If you do, you can get a special youth working visa for Australia, England, Canada, and other Commonwealth nations for 1 or 2 years, depending on the country, as long as you are 29 or under. DO IT!