My mother would always refer to these as 'beer & sandwich' weddings...much more casual than the elegant (and sometimes extravegant) receptions we're used to today.
She also mentioned once that her older sister's wedding in 1947 was one of the last 'beer & sandwich' affairs. By the time my parents got married 10 years later things were quite different.
As to the subject topic...I too never quite saw the point in Paulie's insult to the fellow passing him the sandwich.
Maybe instead of goboghoul/gobogol, he would've preferred turkey & swiss!!
Apple