Having a character system and allowing players to change what they look like
Having the ability to buy new clothing for the player to wear

https://www.gmodstore.com/scripts/view/3587/charsyst-character-system-for-your-rp-server
https://www.gmodstore.com/scripts/view/3781/sh-accessories-darkrp

Getting both will allow players to customize and allow bings to set which groups and wear what