Where I used to play, we mostly played standard chess openings. Bughouse is different enough that one can have expert chess players playing against novices and since it is team-vs-team, the novice doesn't get totally stomped flat.

Something rather common was for most of the pieces to end up on one board, so my guess is that these strange openings are intended to block off places you'd normally use to drop in a piece that your team-mate captured. So it becomes more like Go,