I sometimes while on travel use my Nexus 7 (2013) as a source component. I use Spotify, Pandora, and TuneIn Radio and of course locally stored music. Nexus 7 (depending on what custom ROM you use will also work with a USB DAC.
I can use my HiFiMeDIY DAC with Cyanogenmod 11 and just recently Google released a preview of Android L which is the successor to KitKat Android.
Out of the box Android L has DAC support which is a first for the stock Android kernel and while my HiFiMeDIY DAC doesn't seem to be supported my Fiio E17 and E07K are supported.
Nexus 7 with Fiio E07k is going to be a great system for the hotel room.
And as a source component doesn't sound bad at all. Pretty good.