This is the 7309th most frequent Russian word.
вьегас
The word "вьегас" does not exist in Russian; it may be a misspelling or misinterpretation.
Here, 'Вьегас' is used as a proper noun referring to a city.
Я хочу посетить город Вьегас в следующем году.
I want to visit the city of Viegas next year.
In this sentence, 'Вьегас' again denotes the name of a place, indicating where the friend traveled from.
Мой друг недавно вернулся из Вьегаса с интересными рассказами.
My friend recently returned from Viegas with interesting stories.
'Вьегас' is employed here as the location being discussed, specifically about its nightlife scene.