Wut da fog?
I'm 5'10", 185 pounds.
I lost only one bar fight, boxing only.
Been arrested 7x, charged twice, only one "count" stuck (Disturbing the Peace, as a drop-down from Assault with a Deadly Weapon).
Anyway, the key to "winning"a bar fight is to assess whether your opponent is dangerous, or a drunk idiot. If only a drunk idiot, then just ignore.
If dangerous, then immediately commence beating the absolute ship out of him, as soon as you make the read.
NOTE: The only bar fight I lost, I hadn't yet boxed, and I tried to "be cool and talk my way out of it" ... MIS-reading the legit malintent of my aggressor. Should have smacked him, up-under the jaw the moment I read his angry face.
As Gen. Dwight D. Eisenhower once quipped, "It ain't the size of the dog in the fight, it's the size of the fight in the dog."
A street fight has more to do with reading accurately, responding immediately, and going for a finish ... than it has to do with "size and weight" ...
Never fought anyone my size — everyone larger, some significantly so.