I'm sorry, but there is no way that starting relationships in work is common for people of our generation.
To begin with, the overwhelming majority of people in any workplace will already have a relationship outside of work, or be married to people outside of work.
Second point is that, while certain things and behaviours were tolerated in the past, I think our generation has been overwhelmingly clear that the workplace is not the place for men to lech after women, and this is no longer socially acceptable.
You may claim that couples are getting together in work, but this is far from mainstream. I have frequently seen news articles from the BBC and the Guardian which are quite vocal and passionate about stopping workplace harassment. I think it would be safe to say that their perspectives are more mainstream than yours, or anyone else on this thread. If relationships in the workplace are so common, then why is the media so vocal in its opposition to it?
Last point is that even if a relationship does successfully develop in the workplace, it's still a minefield. The relationship generally has to be declared to the employer so they're aware of conflicts of interest. Things get messy if the couple breaks up.
The fact that I've never seen a relationship initiate inside a workplace confirms that I am likely correct that it's not a common phenomenon.