Cocaine-Eric Clapton
Verse Riff

G|----------------|----------------|
D|----------------|----------------|
A|7-7-----5-5-----|7-7-----5-5-----|
E|----7-------5---|----7-------5---|

Chorus Riff

G|----------------|----------------|
D|----------------|----------------|
A|7---7---5---5---|3---3---2---X---|
E|----------------|----------------|

The verse is repeated about eight times and the chorus is repeated
twice.
Thats it. Listen to it to get the arrangement of choruses and verses.