Taking a dog along on a first date - I assume this means a drink or a meal - can help break the ice.
It's fairly common knowledge that dog owners, if on a walk, will stop and talk to other owners.
In the dim and distant past when I rattled a charity tin, I took my dog and people would often come and talk to her. They wouldn't necessarily put money in the however.
If he's a nice man I hope that your daughter likes dogs.
At the moment I'm receiving aftercare following an op. A nurse comes in once a day and my dog Zelie is always interested in them and often gets in the way. They usually have a dog or cat or both and it gives us something to talk about.