When the Avengers were all together in the tower they tried to find something to do. Sure they could all entertain themselves on their own or with one or two other people but when they all tried to do something together, things just didn't work out. They tried all kinds of games but something always went wrong.
There were some games Tony didn't even want to try with them. No one wanted to play paintball with Clint Barton. That was just like setting yourself up. Truth or Dare was out when Natasha had to play. Clint warned them that she could tell you, but then she would have to kill you. The worst part was they never seemed to be joking. Hide-and-go-seek didn't seem too safe to play with Bruce. Thor doesn't understand card games and Steve just doesn't like games that involve the computer or TV.
Thor went as far to suggest some games from Asgard but most seemed to dangerous or just plain not fun. Steve said some from back in his time but Tony complained they were boring. When Natasha suggested one they just starred in horror until Clint started to chuckle. He then suggested one that seemed ok but everyone doubted they could do it except maybe Natasha. Bruce tried to suggest one but it had to do with science so they rest complained. Tony went on about a drinking game that they actually did try. It didn't exactly end well and Tony complained that Steve was cheating.
So they all sat around the living room, sitting in silence with the occasional sigh. Most coming from Tony, of course.