Points

total sources 4 - Bartoneus

man on left added - Beetle, El Verde

shadow on girl next to him fake - Beetle, El Verde ( no cloning seam on her, rather it is a double of the man on the left repeated behind her, in order to get the red neon sign on the back wall)

fade looks odd (because she and everyone but the man on the left are burnt through a darker image) - Beetle

wall behind girl on right is brushed blue (fake glow) - Beetle

neon signs are added. - Beetle

Mudslide, Bass Ale & Smith's bonus - El Verde

The big thing missed were the neon signs. They are so morphic in the background that most people just take them for granted. But all of them were added, as you can see in the photos.