its in Shadowhaven...Shadelings Roost or something like that (its the building straight across from bazaar zone entrance). Go downstairs in that building and turn to your right...there is a chick there. right click on her and she has tokens to buy. each one costs 100pp with 140 CHA. CHA effects prices of coins.
after you get a token, turn around and there are 4 NPCs behind 2 counters. just hand them a coin (or more up to 4 SINGLE coins, not stacked) and hit Give...you will get back something or nothing. I spent about 1600pp today and got 7 pieces of minor stat food, a potion with essence of human effect and occasionally I got awarded more tokens. once I even one 10 tokens.
rarely you get something of good value...apparently I haven't been that lucky and won't waste anymore money trying. I would'nt waste your money unless you don't care as the only decent weapons I've seen linked by winners have also come with a huge $$pp amount they blew getting it. Not to say you couldnt buy 1 token and win big, but thats rare and how you get hooked.