Some other programs don't have a separate playback queue list at all (e.g. iTunes). I consider those programs crippled.
You can mimic that behavior by setting MC to not jump to Playing Now, double-click to replace Playing Now (all) and the Play button to play the visible files. (Options > General > Behavior...). The Playing Now list will still exist in the background, but you don't need to see it.
By using the Zones feature and various view options you can do many "DJ" things that are not possible with lesser player programs. Here is an example:
http://yabb.jriver.com/interact/index.php?topic=50518.msg345477#msg345477EDIT
If you haven't already noticed this, you can access additional play commands when you right-click a file.(e.g. Play > More Play Options > add as next to play, Send To > Play (Zone...)
add one or more zones first, etc)
You can also set MC to list up to eight recently used right-click commands in the beginning of the right-click menu (Options > Tree & View > Advanced...)