We had a picnic day for JUST staff (we were bummed about no families at first, but it worked out and was a lot of fun!) and this was in lieu of a work day. We all HAD to go, and it was a work retreat. It was like summer camp, we had a hula hoop contest (ridiculous and funny) and we had teams board games, trivia pursuit, charades, dodgeball. It all sounds ridiculous I know, but it was great! I got to know a lot of people at work that i had not met before and we were forced to interact and meet each other, now we are all friends.
We also once had to design clipboards for each other. We filled out a survey with fav color, fav tv show, fav quote all kinds of fiun facts and then we had to draw a random name from a hat and make that person a clip board. Then they were all shelaced (spelling?) and we presented to each other at a meeting with a brief explanation. I still use mine!