I installed Melty Blood some time ago on the school PC system, so everyone has access to it. Then I had some Network matches via caster with other guys and some were interested in how good the game looked. So I "recruited" 2 serious player here, but one of them quit MB a few months ago, because he had other stuff to do.
The other way, I used once was while a school party. Some guys managed to get a room and installed a few consoles, PCs etc. I brought my PC, too. I had the demonstration of Garou MotW running, then the MBAC intro + demonstration. After a few minutes, some guys really were interested. One fight was 1€ and I made 34€ this day, but noone asked me how to get the game or something. Even a teacher found this good.
It's just like showing the public this game without being penetrant.