The original is in the key of Eb with a key change up to E (i think the transition chord is an F chord)
I have come up with this version as a novice version that allows for a key change without the more difficult
barre chords. This version goes from key of Eb to F 

CHORDS (Relative to Capo on 3rd fret)
 x32010
 133211
 320033
 xx0232
 x02220

[Verse 1]
             
On a warm summ

             
er's evenin' o

             
n a train boun

      
d for nowhere,
             
I met up with 

             
the gambler; w

             
e were both to

           
o tired to sle

ep.
             
So we took tur

             
ns a starin' o

             
ut the window 

       
at the darknes

s
             
'til boredom o

            
vertook us, an

              
d he began to 


speak.


[Verse 2]
             
He said, "Son,

             
 I've made a l

             
ife out of rea

              
din' people's 


faces,
             
and knowin' wh

             
at their cards

             
 were by the w

              
ay they held t

     
heir eyes.
             
And if you don

             
't mind my say

             
in', I can see

              
 you're out of

 
 aces.
             
For a taste of

             
 your whiskey 

             
I'll give you 

                   
some advice."


[Verse 3]
             
So I handed hi

             
m my bottle an

             
d he drank dow

          
n my last swal

low. 
             
Then he bummed

             
 a cigarette a

             
nd asked me fo

    
r a light.
             
And the night 

             
got deathly qu

             
iet, and his f

              
ace lost all e

 
xpression.
             
Said, "If you'

              
re gonna play 

             
the game, boy,

             
 ya gotta lear

             
n to play it r

       
ight.


[Chorus]
             
You got to kno

             
w when to hold

             
 'em, know whe

     
n to fold 'em,
            
know when to w

             
alk away and k

            
now when to ru

n.
             
You don't coun

             
t your money w

             
hen you're sit

            
tin' at the ta

ble.
             
There'll be ti

              
me enough for 

            
countin' when 

             
the dealin's d

        
one.


[Verse 4]
             
Ev'ry gambler 

             
knows that the

             
 secret to sur


vivin'
             
is knowin' wha

             
t to throw awa

             
y and knowing 

        
what to keep.
             
'Cause ev'ry h

             
and's a winner

             
 and ev'ry han

      
d's a loser,
             
and the best t

             
hat you can ho

             
pe for is to d

             
ie in your sle

       
ep."


[Verse 5]
             
And when he'd 

             
finished speak

             
in', he turned

              
 back towards 

    
the window,
             
crushed out hi

             
s cigarette an

             
d faded off to

 
 sleep.
             
And somewhere 

             
in the darknes

             
s the gambler,

          
 he broke even

.
             
But in his fin

             
al words I fou

             
nd an ace that

              
 I could keep.


[Chorus]
             
You got to kno

             
w when to hold

             
 'em, know whe

     
n to fold 'em,
            
know when to w

             
alk away and k

            
now when to ru

n.
             
You don't coun

             
t your money w

             
hen you're sit

            
tin' at the ta

ble.
             
There'll be ti

              
me enough for 

            
countin' when 

             
the dealin's d

      
one.