There are some characters there. If you go in and ask for Dave (no joke) and tell him that "Sean who used to work at Hamilton's" sent you; he can tell you about some of the cooler stuff he keeps stashed away.There's another great / unique shop actually in the state park in Old Town. Not a great lounge, but they have some good stuff in the shop. It's called Racine & Larime. Might be worth a stop during the day sometime.
If the Top Hat dude is there, or the big guy with the goatee, don't worry about finding any treasures. They kinda treat everyone like tourists who don't know what they are doing.