All the drop-in ice games at community centers that I usually play in are pretty low key, wide range of skill levels with the players. There are of course going to be superstars who will light you up, but they will eventually get bored of tearing you a new one every time on a breakaway. I find the greatest thing about drop-in hockey as a goalie is being able to watch the way the other goalie plays/moves at the other end especially if they are better and more experienced.
What I'm saying is that the drop-in atmosphere is usually pretty casual, most of the times. There are occasionally those who feel the need to show everybody on the ice their mad skills, but most guys who go to these drop-ins understand its just about having fun. So regardless of whether the worse player is the forward who can't stop, the d-man who can barely skate backwards, or a goalie who is scared of the puck, it's typically not a big deal. Everyone's just out for a good time and to hopefully learn to get better.