Yes. My parents love DH's parents and vice versa. DH's parents are local to us, so when my parents visit, we always get together in a huge group. My parents also tend to host huge holiday meals and they invite DH's parents and siblings (and their dogs), my sister's inlaws, my cousins' inlaws ... it's amazing. They are closest with my inlaws but get along well with sister's inlaws too. And my aunt and uncle live near my parents and they are close with their kids' inlaws as well and so they will frequently have big dinners with those folks and my parents. At Thanksgiving there were 28 people and of those only 6 were young children -- the rest were family/inlaws.
And my parents aren't even social people. When I got married they had a hard time scraping up more than 4 friends of their own they wanted to attend the wedding, and all of them were work colleagues. Having their kids and nieces get married has really expanded their social circle, haha.
It no doubt helps that everyone is same ethnic background, religion, and politics. Just a bunch of liberal Jews from the New York/ New Jersey / Philadelphia area.