If a libertine of your choice walked over and sat down next to you, what do you imagine your immedeate reaction would be?
If it were Gary, I'd stare a moment and say "You're that chap from the Libertines! I saw you play two years ago..." and offer to buy him a pint.
If it were John, I'd say "Hello Mr Hassall. Please cheer up." And offer to buy him a pint.
If it were Peter, I wouldn't be able to say anything. I'd think about kissing him and offering to eradicate his demons with love and music, but I'd probably just sit there staring at him until he'd get freaked out and ask me why I looked like Dobby the house-elf. To which I'd reply "I love you, and I can save you. Now please stop hitting journalists, cancel this bloody documentary, and have some time off to come camping with me. I'll change your whole perspective on life!!" Well, I'd probably say something even stupider, but my imagination is limited.
And I'd offer to buy him a pint.
If it were Carl, I would make a point of not talking about Pete, unless I got him drunk enough. Poor guy must get sick of seeing his ex-bandmate plastered all over the tabloids like some bimbo. Then, when he breaks down in tears, I'd pat his head and say "There there, Carlos. There there. Have some more Rohyp--er, ice-cream."
And offer to buy him a pint.
Context: They're a band, I doubt this works as well if you don't know of them, but I found it amusing anyway. From her anon meme.