Social skills lessons are pretty easy to add to the everyday, instead of calling them out in specific conversations. When watching tv or a movie together, talk about what the characters did and why. Talk about if it was a good idea or if there could have been a better way to handle it (say a character interrupts someone else’s conversation, for instance).
What was helpful for my son was social rules for the things he really struggled with, like taking turns choosing what they would play together. We gave him rules like, “When you have a friend over, they are your guest, and you always let guests choose the first activity.” He actually appreciated these rules (we gave 3 I think, spread out over time), because it kept him from getting into constant squabbles.
Role playing is also helpful:
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism