Hotel waiters usually wear black pants and shoes (usually black shoes). Etiquette stipulates that black shoes must be worn with black socks (at the very least, dark socks, and never light and white socks). The reason for this regulation is to keep pants, socks and shoes integrated, and it is very natural and appropriate to wear black pants, socks and shoes.

If you wear black pants and black shoes with a pair of white socks in the middle, it will be very abrupt and rude. It's like a suit shirt on the upper body, leather shoes on the lower part, but a pair of sweatpants in the middle, which is very unsuitable.

white socks are only suitable for white pants and white shoes.

I hope my original answer will be helpful.