I work at multiple sites for my company, all within driving / bussing / riding distance 10-30 miles depending on location. On occasion I'll drive to one site, take my bike on the bus to go to a second site, and ride home from there.
The following day I'll ride to the first site, and drive home.
This allows me to be flexible in the scenery and still get in my "commuting training" rides while fitting in multiple meetings and making the best use of my company time. Not to mention it impresses the co-workers. However it does take a ton of pre-planning as it's not a simple task.