The term "bar swinger" refers to someone who frequents bars and is considered a social, outgoing person. However, there are many synonyms that can be used to describe such an individual, including "barfly," "social butterfly," "night owl," "partygoer," and "clubber." These terms emphasize the person's gregarious and fun-loving nature, but may also suggest a degree of reckless behavior or lack of responsibility. Another synonym that can be used is "connoisseur of libations," which highlights their love of alcohol and the social atmosphere of bars and clubs. Ultimately, the choice of synonym will depend on the context in which the term is used and the tone of the conversation.