Build a movie plot around this: what is the golden mile? a pub crawl

Gary King (Simon Pegg), a middle-aged alcoholic, tracks down his estranged schoolfriends and persuades them to complete "the Golden Mile", a pub crawl encompassing the 12 pubs of their hometown of Newton Haven. The group had previously attempted the crawl as teenagers in 1990 but failed to reach the final pub, The World's End.Gary arrives in Newton Haven with friends Peter (Eddie Marsan), Oliver (Martin Freeman), Steven (Paddy Considine), and Andy (Nick Frost), and they begin the crawl. In the second pub, the group is briefly joined for a drink by Oliver's sister Sam (Rosamund Pike), whose affections Gary and Steven fought over in school. At the third pub, Gary is turned away due to being barred as a teenager, but drinks some beer left behind on a table outside. In the toilets of the fourth pub, Gary picks a fight with a teenager and knocks his head off, exposing a blue blood-like liquid and subsequently exposing him as an alien android. Gary's friends join him and fight more androids, whom they refer to as "blanks" to disguise what they are talking about.They decide to continue the pub crawl so as not to make the androids suspicious of their actions, as Gary had told various people that they were doing the Golden Mile. At the seventh pub, the group runs into Sam again. In the garden, Gary, Sam and Steven get into a fight with androids impersonating Sam's twin friends, making Sam convinced of the androids' invasion after previously not believing Gary. At the eighth pub, androids impersonating attractive girls from their youth attempt to seduce Gary, Andy and Peter, while Basil, a man whom they had spoken to in their previous pub crawl in 1990 and who had been known for making wild theories, explains to Steven the details of the android invasion. At the ninth pub, Guy Shepherd (Pierce Brosnan), their old schoolteacher, encourages them to accept their fate and be replaced by androids. Andy realises that Oliver has been replaced with an android after seeing the return of his birthmark, which he had earlier...