What do you think is the most suitable number of people to travel? Why?

For a fun and impressive trip, the appropriate number of people should be 6- 12, because it will be more reasonable and acceptable to share the expenses. Even if these people have never met before, they will get to know each other through a trip. In this number range, you can order a lot and spend very little when you go out to eat. Cost-effective, if it is not particularly bad luck, this number of people will not have great differences of opinion during the trip.