First of all: Dante is more than "This party is getting crazy".
He can talk like most people. Plus if you put a young Dante into a party in real life, and he said "This party is getting crazy!" he would not look any weird for saying that.
But if Dante went into a mall and said that, of course he would get awkward stares. Anyone would, videogame character or real person. Because malls are a place where you buy things not party.
Second this discussion is not about Dante looking cool or getting awkward stares. It's a fact that anyone seeing Dante in real life would stare at him.
The topic is "Would he get laughed out?"
I showed Brad Pit with red leather, and DMC 1 Dante pictures. None of those pictures made me go "hahaha that guy looks really weird!".
And here is someone who cosplays as Dante:
It's easy to take DMC4Dante (anime artstyle) with weird clothes and unpolished design, and put him into a real life picture and say "hahaha look at that guy".
Personally i wouldnt laugh at DMC4Dante, id think "He looks weird" as i do when i look at a pic of him. Do i laugh at him? Not really, it's not funny at all.
Neither would i laugh at that cosplayer over there if i saw him in a causaul place.