There is no strong evidence one way or another for this being typical behavior.
On the one hand, we have on-screen evidence of it occurring at least once (in the referenced scenes). So we know it has happened at least once.
On the other hand, that scene follows a mutiny where most of the established patterns of leadership and behavior were overthrown, to the extent that summary executions of the old guard were occurring. This culminated in the mutineers having a massive party, most likely taking great pleasure in disrespecting the 'establishment'.
If Hollywood is to be believed (and in this case, as we are using it as a meter-stick for a Hollywood movie, it is!) these parties frequently end with everyone appropriately clothed (excepting, perhaps, one person for comedic effect) scattered willy-nilly about the place.
So there's a good explanation for why this could be atypical behavior.
There is, however, moderately good evidence against this being typical Ravager behavior:
In GotG 1, Peter Quill (who was raised by the ravagers from a fairly young age) ends up in a prison. Most prisoners there sleep in large groups in the center of the room. Peter seemed to be distinctly uncomfortable with this, and certainly did not seem used to it.
Thus, while we can't be certain either way, it seems likely that it is not normal behavior for the Ravagers.