Antonyms for the term "country club sets" include words such as "casual," "informal," "everyday," and "basic." Whereas country club sets may imply luxury and exclusivity, a casual setting would suggest a more laid-back atmosphere with no dress code or membership requirements. Similarly, an informal setting would imply a lack of rules and a more relaxed tone. The term "everyday" would suggest items that are intended for daily use, in contrast to the potentially occasional use of country club sets. Finally, basic items could be considered antonyms, as they lack the ornate and elegant features often found in high-end country club sets.