In the past I have run these types of round robins:

o $1 chips from everywhere
o $1 chips from everywhere, except Las Vegas and Atlantic City
o TCR round robin - only Nevada chips in TCR (The Chip Rack), when you take out a chip, you have to replace it with another chip of the same or higher TCR value

Here are some ideas for other round robins I could start:
o Cruise ship chips
o Foreign chips
o Caribbean chips
o Puerto Rico chips
o $1 Indian Reservation chips
o $1 Riverboat chips

Do you have any other ideas?
Which of these would you join?