How to describe Angel?
She's like having a magical mask, capable of transforming into different temperaments and styles as needed.
Every look is one you'd adore, every appearance is irresistible.
Sam decided not to change his clothes specifically for the occasion. After all, he wasn't attending to celebrate someone's birthday. Even if everyone at the table was dressed in luxurious attire, looking splendid and magnificent, it had nothing to do with him.
They were simply from different worlds. Moreover, Sam had no intention of mingling with such people to gain any benefits for himself.
Because that would be utterly impossible.
Without Angel, who among those people would consider Sam worthy of notice? So, there's no point in harboring such thoughts or actions.
Keeping it simple and staying true to oneself can actually be more dignified.