Temporary Queue/Playlist

[Infinexcio]

Sometimes, I just have a few songs I have on mind that I want to listen to, and I simply want to create a temporary playlist that I can add to queue and then set to repeat, etc. (Example: 2 songs from one playlist, 1 song from another playlist, 3 songs from search, all set to repeat)
Currently, there is no way to repeat over a selection of songs without creating a playlist, and having to make a playlist for every such combo is too tedious and easily overcomplicates my available selections. 
Ergo, I would love being able to create a temporary playlist or queue selection, one that auto-deletes after X hours, etc. Could also include the option to save this as an actual playlist (might be useful for other users interested in this feature, should they be using the suggested feature to test song combinations or new ones instead)