Scott I just transpose and play them in C...makes it easier an di can concentrate on singing and entertaining also.
Donny..."C" is my FAVORITE key to play in...that and "G" and "F".
I use the transposer quite a bit...also this site,
http://www.wikifonia.org/sheet lets you transpose the music to any key.
Some tunes that I play by reading, are ofttimes in the original key, like Eb or A or whatever... I play them that way as it is good to keep in practice a little bit.
Ian