The New Adventures of Old Christine Episode 3.03 Popular

Mike is a newly divorced dad who's kid is new to Ritchie's school. Christine gets excited by the opportunity to "mentor" someone who is so similar to her. But Mike is quickly accepted by the meanie moms and is even invited to their afternoon coffee (which Christine never even knew existed). Christine is disappointed in Mike, but he tells her that he just wants to fit in for his kid and persuades Christine that she should change her attitude toward the meanie moms in order to do the same.