Just to share with fellows, I found a marketplace for those who need some extra earnings during trips - Also it would work travel and international minded students. There, you can be a local guide for visitors, show them visiting town and neighborhood, restaurants, clubs, historical venues and so on.
I think originally the site has an idea that it would connect local residents and travelers. But why not using to make connection among us?
If you have additional ideas for new usage such as to offer a ride, language exchange or maybe playing games with strangers, ideas can be up you to find and offer.