Tonsai Village is the bustling heart of Phi Phi. Here, there are no cars or roads, only footpaths. It's located on the isthmus, for which Phi Phi is famous, with Tonsai Bay on the south side and Loh Dalum on the north.
Before 14:30, when the last ferry leaves, the streets are busy with daytrippers and people arriving/departing. After that the island is more relaxed and the difference is tangible.
In the evening the streets fill again with diners looking for a place to eat, additionally as most business is done at night, the tour shops, dive shops and every other kind of shop come to life. Later on some isolated nightlife areas heat up.
Phi Phi is a very bohemian place; after all, bicycle and longtail are the only modes of transport apart from by foot.