I would not tell the parent how they will feel. For myself, I have been actively attending meetups and other events as a way to meet people for about a decade. At the beginning I forced myself to go, even if I doubted I would enjoy it. And sometimes I would make friends and get dates.

But eventually I realised I mostly regretted attending. Sure, you can meet people, but it's a setting that creates an initial bad impression and with people who are probably a bit socially awkward. Doing the initial greeting stuff got really old (job, home country, etc...) and most people were uncomfortable skipping it.

So now I never go to events to meet people. I only go if I would go anyway, because I'm curious enough or know I will enjoy myself. That's my recommendation, anyway.