This would work in SA too. From the time I was a laaitie, lift-clubs have always been big wherever I've lived. Even now people join lift-clubs for school, university, work - it makes sense for a lot of people who work set hours and travel a set route daily.
Finding a lift club is usually the hard part, not knowing of they are reliable etc. That's why I feel this app would work in SA as well. Hope it rolls out here too.