I'm interested in participating in a future RR, but first need to pick up some traders. I'm all out at the moment.

I am planning a trip to LV in the next 3-4 months. Any tips in picking up room keys from various hotels? (Other that keeping the keys from your own room, obviously.)

What's the reaction to asking the front desk for a free key(s)? (I assume they would say they're only for guests, but I've never tried.) What about bell desk or parking attendants? Any other productive room key "harvesting" tips that anyone wants to share?

I'll try to obtain some fresh traders on my next trip, then will sign up for another RR.