[pletnes]

What if the work event allows for the first social interaction? If there’s no opportunity to get to know people from work, you may not discover common interests, etc. I’ve certainly been surprised a few times about colleagues I realized I didn’t know much about.

[apabepa]

A more natural way would be to arrange for people to work together in smaller groups on tasks as part of the normal work. If you provide this then I agree with the parent poster if there is a social interaction to be had it will come. If not that's OK as long as we can work together in reasonable harmony. I value professionalism, if I can make a friend through work that is great but it should not be the norm that we all have to be friends to get along.