The phrase "hanging around with" is often used to describe spending time with someone in a casual way. However, there are many synonyms for this phrase that can be used to add variety and depth to your language. Some examples include "spending time with," "chilling with," "associating with," or "keeping company with." Depending on the tone and context of your sentence, other options might include "socializing," "hanging out," "befriending," or "running with a crowd." Experimenting with these different synonyms can help you find the perfect expression to describe social interactions in a more nuanced and interesting way.