1/ that would be unusual for me in LOS unless with a BG, as I didn't go out with friends in LOS. Never had a problem alone after 1 am in LOS. More worried about attackers in western countries, which are rife with scumbags.
2/ Never assume anyone else will help you.
3/ LOL. More likely that while you have one in a headlock the other(s) will be hitting you in the head.
4/ Don't use your hand. It's more likely to end up with broken bones. Forehead is strong though.
5/ "They" indicates more than one, ergo you probably lost before it started.
6/ Best plan is avoidance, second best run.