Well, maybe not 'boys' exactly, they do seem more middle-aged. A band of musicians, gypsies, from who knows where and when. Name the 'band' as well as each musician.
My idea is Skullcap. I'm just fascinated by their headwear and think that Skullcap works as a name for a modern band. The boys are Z (the guy with the hookah), Off (cuz he never wants to be photographed front and center, thus always showing his rightside profile), Cheers (the guy at the table, who is perpetually in a good mood), and Moto (cuz he's always bent over).