Here are some examples of how "mingle" can be used:
* "The guests mingled at the cocktail party, chatting and laughing."
* "I tried to mingle with the other students at the orientation."
* "The children mingled on the playground, making new friends."
"Mingle" suggests a less formal and more spontaneous interaction than, say, "socialize," which can sometimes imply a more structured event or conversation.