From the pages of today's (Sunday) Los Angeles Times travel section:

The Stratosphere Tower Hotel and Casino says it will refund players' initial slot-machine losses up to $125.00 when they join its bonus club, which lets visitors accummulate points for discounts on rooms, beverages and other items. The offer, which a spokesman says is unique in Las Vegas, applies to the first 30 minutes of play on slot, reel and video poker machines after the player joins the club. It is not available to local residents. Visitors sign up for the players club free of charge in the casino. Tel (800) 998-6937.

As an adjunct to the above announcement, Harrah's in Reno, advertises in the Sacramento Bee (and possibly other papers) for the same promotion (except it's reimbursement is up to $150.00 of losses for the first hour.)