Try a forum that has something to do with business, real estate, or stocks. As a rule, if you have nothing to offer (i.e. skills, experience, hot tips, unique opportunity) then you'll have a hard time finding 'partners' - but there are plenty of forums where people discuss that kind of thing.
I'm not posting completely useless info, it was a fair question. I've been involved in business where investors wanted to know EXACTLY what I had to offer - a resume and bio was just the beginning.
If you are going to be part of an investment group, you need to add something personally to the mix. Otherwise, your option is to simply add cash which is about the least compelling reason to bring someone into an investment scenario - there is always more capital available that skilled people who can make projects/concepts work.
If you don't change your attitude then you'll probably get the same treatment here that you received at the last forum you visited. There are a lot of successful people here that could help you, if you would just stop whining for a minute to actually listen.