Casual talk about hobbies or movies or travel. “Hey I really want to visit XYZ area, has anyone been there?” “How did you like this project? What’s your next one?” “I was so busy with this project so I had no time to go out, any new restaurants around, any new movies came out?” “Coffee is good in this place but j prefer coffee in XYZ place, anyone knows about that place?” Etc etc etc.