Well, these aren't playable in the sense that you have two teams that shoot each other. I'd say these are maps more for like, relaxation, just a few friends pballing in a private server (which is what Dak50 and I did). Don't get me wrong, they ARE good maps. It's just that for one thing, most of these maps are too crowded and compact, there's barely enough space on some maps for teams of 3, and those that ARE playable, don't have too many paths for players to take, resulting in a massive line fest. There WAS this one good map that was playable though, it was called top_ally. If you want to continue mapping, I suggest you continue working on that one. It's a pretty good map, could do with some nice lighting and a few slight changes to the layout.
EDIT: Posted a few screenshots of top_ally, hope you don't mind. Obviously the map could use some texture reworking, but overall the gameplay was decent and the map is worth completing.