https://www.landrysselect.com/
Very interesting. $25 one-time fee to join. You get $25 in food credit for signing up (can be used at some of the GN restaurants, but not all, and/or can be used at other Landry's-owned locations throught the US like the Rainforest Cafe), and $25 food credit during your birthday month (unclear if that's only in your first year of membership, or each year). ...plus a room upgrade (based on availibility) and VIP check in at the GN.
I'm very curious to hear about your experience, Alan. If they're still offering the GN room upgrade perk when I book my next trip, I'll probably go for it -- with the $50 back in food for the $25 membership fee, I can't really see how one has much to lose.
Edit: I did some more searching and found this message thread with some people who have posted about it. One was able to redeem the $50 ($25 signup and $25 for his birthday month) in the same visit at the Rainforest Cafe at MGM Grand. One was upgraded from the Carson Tower to the new Rush Tower, and one reported having booked the Rush Tower, and not being given an upgrade from there, but they got 10% off their room (which more than paid for the $25 membership fee). As long as they keep honoring the card, this looks like a winner.