Translation of etwa

A bystander who watched the entire scene all the time decided to help me. He was an older man, around seventy, but nonetheless he went to the oldest of these kids and slapped him. The boy was sixteen.
The bus was supposed to leave at around 4 o'clock in the afternoon, so that I still had two to three hours to organize. I went for lunch at some strange place and hardly ate as it was too ugly.
That was a funny coincidence and she told me about some good parties on the island. I went to one these parties which was actually located in an open air bar. There were few people but everyone connected.