There are generalizations we can make about social class, but it isn’t like everyone in that class is exactly the same. Being born into a particular social class means you have a higher likelihood of being in the same one as an adult, but it doesn’t work out that way a lot of the time. Many children climb up or fall down the social class latter.
There have been studies in America that say being rich does correlate to happiness. Social class is not just money, but also interwoven in there is education level and some other things. The way people spend there free time can vary depending on the class. Lower to middle class might be more likely to go fishing, while upper classes might be more likely to go out on their yacht, or take a weekend away on vacation. But, again there is all sorts of crossover.
Cars we drive, clothing we wear, where we live, school we attend, even how we look can be affected.
You might be interested in looking at statistics and information on psychograhics which look at buying habits, including how people spend time regarding social class and other demographics.