How do homeschool kids socialize?

Social activities. Some homeschooled children attend public school sports and extracurriculum activities. Other sources of socialization include church or regligious group activities, sports like little league, soccer and activites at museums.
Normally. Social play and social activities should remain normal and appropriate. The only "home" process would be the school curriculum. Church groups, sport clubs, youth groups all provide excellent social experience. All children should have normal and appropriate social experience.