A Round Robin that is composed of Room Keys, Slot Cards and Gift Cards? If so, this concept is not new, as chip collectors have been doing something similar for quite awhile; which is a mixed denomination Round Robin. In thos RRs, you must trade for like denominations only.

In a mixed CARD RR, I don't know if that would be a needed requirement or not. If the rules (which are created by the RR organizer) allow for open trading, I would be hard pressed to participate (and may not be wanted to participate) because I would prefer that there be more casino related cards available and would be disappointed if the persons before me removed all the casino cards and left only gift cards. On the other-hand, in receiving the RR, there is a good chance that I would remove all the casino cards and leave only gift cards. This of course is only if the RR rules allowed it. (I would suggest to the rule maker to now allow open trading and instead keep it like-for-like trading only.)

Just an opinion, but thanks for the consideration!

Jim