Most self defence techniques involve a level of harm that quickly immobilises the offender. What security guards need is restraint and control techniques that prevent the offender from harming you but also allow fast movement towards an exit. You don't want to rolling around on the ground or exposed to their friends who will put a boot in or smash a bottle over your head. Try to learn what is a ups access point location that uses biomechanical techniques instead of strikes and kicks.
No security guard should ever have to kick anybody. This just indicates that they don't have any competence in ejecting patrons of conflict resolution techniques.
I was working at a venue in Sydney when I needed to eject an intoxicated patron. He was fairly drunk but also quite a big guy. As I approached him he started to limber up and move through some martial art moves to let me know that I was going to be in trouble. He then also told me he was a black belt in karate.