How about this for a strange structure?:
I play in a weekly, extremely social, about the hanging out and not really the poker, home game with the following structure:
Starting stacks (Non-denom dice chips):
20x T100
20x T200
20x T300
20x T400
20x T500
Blinds:
200/400
400/600
600/1200
800/1600
... (Always add 200 to the SB and 400 to the BB)
Blinds go up every 1 orbit (7-10 hands) for the first few levels. Then the next few is after 2 orbits. Then after that it's usually until someone says "Are you guys ready to increase the blinds?"
Chips ups never happen. T500 is the largest chip and all chips stay in place the entire time.
They don't seem interested at all in changing the structure either since they've been playing that way for so long.
After a few drinks people regularly spend a full 30 seconds counting out a call, which is usually made with many different colored chips. (And is regularly over/under by a large amount)