laugh with
Verb
Meaning
Used other than figuratively or idiomatically: see laugh, with.
(transitive) To laugh along with someone in a friendly way; to laugh at someone's jokes; to enjoy humor in a way that is friendly and enjoyable to the person responsible for the humor; usually contrasted with laugh at.
Source: en.wiktionary.orgExamples
I'd rather laugh with the sinners than cry with the saints, the sinners are much more fun.
If you can get someone to laugh with you, they will be more willing to identify with you, listen to you. It parts the waters.
It's really fun and just to be with a friend while you're working really hard. It can sometimes be really stressful. Also it's just fun to have someone to laugh with and have a good time with.
They are not all friends who laugh with you.
Laugh with those that laugh.
To cry with one eye, and laugh with the other.