How much of this is actually illegal? In workplaces you have legal recourse but in this situation it doesn't seem like there's anything you can do except blast their name out there for everyone to see.
The groping is probably illegal independent of workplace context, the stuff done in hiring is as illegal as if it was done during employment, much of rest is probably not illegal.
I'm not commenting on the ethics of this, but the woman who was "groped" stated that she consented to it. I know this may seem distasteful, but whether she allows the kissing/groping because she's attracted to him or because she just needs his help, it's still consent in my mind:
"I felt like I had to tolerate it because this is the cost of being a nonwhite female founder,"