Who knows of quiet and romantic places for or what to do on a first date (in Mauritius)?
I'd like to know about your preferences,ideas...etc
The first part of your question has already been discussed here.
The second part, however, is subjective. Teenagers may prefer to go watch a film together while young adults may find going on a lunch/dinner date better. The older generation may find sitting on a bench near the seaside/botanical garden more suitable for them.
When going on a first date, the most important thing is to make it enjoyable by both persons. So you need to know what the other is into first. Then conversation is the key.
I prefer nature walks where I'd get the opportunity to know the other person better...