Riff1 play this at the same time as the guitar, after the guitar has played the picky bit
G:---------------|
D: --------------|
A: 4-----2-----0-|
E: --------------|
 
Riff 2 play this when it gets to “Theres nothing left to do in this town”
G:-------------------------------------------------|
D:------------55555555-----------------------------|
A:55555555------------55555555-22222222-33333333-1-|
E: ------------------------------------------------|
 
Riff 3 ….”It's over me”
G: ----------------------------|
D: ----------------------------|
A:44-44---44-44---00-00--------|
E:-----------------------00-00-|

Riff2 

 Pre-Chorus….”There's nothing left to say in this town”
G: -------------------------------------------------------|
D: -------------------------------------------------------|
A:55555555------------55555555-22222222-33333333-11111111-|
E:---------33333333---------------------------------------|

Chorus….”Tonight”
G: -------------------------------------------------------------------|
D: -------------------------------------------------------------------|
A:555555555555555-------------------2222222222222222-1111111111111111-|
E:-----------------3333333333333333-----------------------------------|

Pre chorus, the guitar plays another picky bit here and then the bass comes in on “There's nothing left to do in this town”

Chorus….”Tonight”

Riff4  play this at the same time as the guitar
G: --------------|
D: --------------|
A:1-----3-----5--|
E: --------------|