There is another game to get relaxed and have a fun. What is particular about it is that much time is not required, lunch time will be quite o'k for this. So…
The group sits in a circle. The first person turns to the person on his/her right and says "Hi Baby, if you love me baby, please, smile." The person should in his/her turn, reply without smiling or laughing "Hi baby, I love you baby, but I just can't smile." In case the person addressed replied quite serious he/she then turns to the next person on his/her right & repeats the question. In case someone smiles or laughs he/she is eliminated and at the end there are only two people left - the winners and they can be treated to…an ice-cream, for example. Everything depends on your imagination!