Have a look at Tryst or 411 and you'll see indy listings in Minneapolis. Unless you're a paid 411 guy you're not going to find anywhere like PERB to find reviews and scam warnings. We are spoiled up here in the great white north in terms of legality, options and cost.
I've been tempted over the years, and I hate to waste the opportunity of being on my own in another city, but Pooning anywhere in the US is a risky game IMO, and not worth the cost.
Also have search through the Lounge and International sections of PERB and TERB to see some perspectives.