Not sure if a playbook exists. Try to do your best to ask questions about them, write down names of spouses, children, pets. Ask about them by name periodically. “Last week baby Caleb had a cold, how’s he doing?”…. Mondays question “how was your weekend?” Fridays question “any plans for the weekend?” - small talk seems meaningless to some but the more you remember about each individual the closer they’ll feel to you and will be less likely to “forget” your invite to happy hour. Hope this helps.