I use to do Ju-jitsu and the one on one fights used to include grapple/restraint. This was wholly possible. This said, when I was a skinny 16 yr old this guy who was basically a 30something yr old 16 stoner built like a Dwarf (same width as height) once embarrassed me in front of the whole ju-jitsu class and just stood there completely immobile grinning at my vain attempts to put him on the floor. Would love top meet him in the same scenario now...one, I am far bigger and stranger than I was....two, he would be about 60
This said, I just discussed this thread at lunch with my 2 m8s who are doormen and they agreed with the circumstances you stated. Some guys just wont be restrained.
The rumes are basic enough to just tweak to the situation, if the person being restrained is 'enraged' or similar adjust accordingly.