This image was adapted from a picture posted to publicdomainq.net. All of the images on these sites are in the public domain i.e. CC0. This site is only in Japanese but can be easily navigated with Google Translate.
商務酒會
alcohol、beer、Comic characters、cute people、drinking、female、fun、JMC、male、man、office、party、people - cartoon - cute、publicdomainq.net、suit、tie、woman、work
醇、啤酒、漫畫人物、可愛的人、喝、女、開玩笑、JMC、男、人、辦公室、派對、人 - 卡通 - 可愛、public domain Q.net、適合、貼、女人、工作
資料來源：openclipart ( https://openclipart.org/ )