Do you think we ought to be mingling?

Firmly but earnestly ask: ‘Do you think we ought to be mingling?’
Oh, let’s not use all out stories up now – I saw we’re sitting next to each other at supper.’ (Allowable if true. Heck, passable if false.)
Ambush an innocent and use your escape line: ‘Have you met Jimmy?’
‘Do excuse me, I’ve just got to nip to the loo.’
‘Oh golly, I need to get a top-up.’
Spill red wine. On yourself.
Apologise: ‘Gosh, look at me monopolizing all your time.’ Leave.
Break into a very aggressive coughing fit. But please – do cover your mouth.
Be a canapé whore, and scamper off chasing the last macaroon.
Answer your phone. Didn’t ring? No worries, it’s on silent.
Old classic: fart.
Start to hum.
Look over their shoulder. A lot.
Stare them straight in the eye and mutter: ‘I’m bored.’