I am fortunate that I can take Hollie with me to work, and I do (everyday). She has lots of interaction with the people I work with and my employers two dogs. Hollie is different from most of the dogs mentioned in this post. She loves to play, run, hunt, etc and would stay at the dog park or anywhere fenced with a playmate for hours (granted I HAVE to be with her - no mommy = no play). As I have read here, a tired basenji is a happy basenji (and a tired baseji = a happy b owner!!).
Lori, is there anywhere you can take the dogs to run when you are off work? A friend or relative with a fenced yard? I know most people don't like dog parks, but we visit ours ONLY early in the mornings when it's not crowded. Is this an option for you? I know they like to sleep, they are dogs, but they do need exercise and socialization too.
Good luck. Let us know if you discover a way to get them more active.