They're perfect for an evening out with bubbles and the barman will be aware of them if he's done a stocktake? (6-6)

'aware of them if he's done a stocktake?' is the definition.
I know nothing about this answer so I can't tell whether this works.

'they're perfect for an evening out with bubbles and the barman will' is the wordplay.
I cannot quite see how this works, but
'an' could be 'i' (Roman numeral for one) and 'i' is present in the answer.
'evening' could be 'eve' (synonyms) and 'eve' is found in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
'will' could be 'll' (contracted form, as in 'he'll' - 'he will') and 'll' is found within the remaining letters.
This may be the basis of the clue (or it may be nonsense).

'be' acts as a link.

Can you help me to learn more?