These are the chords to to Room 94's The Morning After. The chords are pretty much 
just G and Cadd9 the whole way through apart from the bridge part.

Intro: G  Cadd9  G  Cadd9  
            
            GI (320003@1)just woke up to 12 missed calls,
Cadd9
Lost my keys, got no clothes on,
 GWhat (320003@1)the hell did I do now?
    Cadd9The (x32030@1)house is a mess, all my friends are all gone,
   GSomeone's (320003@1)drew all over my face,
Cadd9
I don't recognise this place,
       GGot (320003@1)a love bite on my neck,
          Cadd9There's (x32030@1)a naked girl lying in my bed, like,

Carry on with G Cadd9 pattern

I don't care what they say,
Imma do it anyway,
I'm gonna do what I like,
Stay up all night, like,
And I don't care what they say,
Everybody's gonna know my name,
Before the morning light,
Stay up all night like this,

So I check my jeans, where's my wallet?
Bruise on me, wonder how I got it,
Tagged on Facebook who the hell took 
This picture, I look like shhh...
Got a black eye, did I have a fight?
Wondering how I'm still alive,
That girl over there, over there, over there,
She's giving me the eye, like,

I don't care what they say,
Imma do it anyway,
I'm gonna do what I like,
Stay up all night, like,
And I don't care what they say,
Everybody's gonna know my name,
Before the morning light,
Stay up all night like this,
Stay up all night like this,

Am (x02210@1)     F (133211@1)               GIt's (320003@1)so hard to find the words to say,
Am (x02210@1)   F (133211@1)      GHow (320003@1)I feel when I see your face,
Am (x02210@1)      F (133211@1)              GI (320003@1)wanna tell you what you mean to me,
Am (x02210@1)    F (133211@1)                GBut (320003@1)I can't say, I guess we'll never be,

Resume G Cadd9 pattern

One drink, two drink, three drink, four,
Then I'm lying on the floor,
Five, six, seven, eight, nine, ten,
I wanna do it all again,
One drink, two drink, three drink, four,
Then I'm knocking at your door,
Five, six, seven, eight, nine, ten,
Then I'm lying on your bed!

I don't care what they say,
Imma do it anyway,
I'm gonna do what I like,

I don't care what they say,
Imma do it anyway,
I'm gonna do what I like,
Stay up all night, like,
And I don't care what they say,
Everybody's gonna know my name,
Before the morning light,
Stay up all night like this,

Saying I don't care what they say,
Imma do it anyway,
I'm gonna do what I like,
Stay up all night, like,
And I don't care what they say,
Everybody's gonna know my name,
Before the morning light
Stay up all night like this,

http://www.room94.co.uk/