Uhhh... the surprise of a cash-only restaurant always catches me off guard and the fact that there was no ATM annoyed me even more (drove to a nearby gas station). BUT, it was marked clearly on the menu, so I was able to handle it before I got the bill.
A 'greasy spoon' sort of spot - I had an omelet with mushrooms, cheese (of course - it IS Wisconsin) and bacon with a side of hashbrowns. For the record, I could do without the hashbrowns next time around. BUT the amount of cheese in the omelet will have me coming back for another round (though, that may be the only reason).
The place was a little cramped, with stools that seemed unusually low to the ground. I did have the misfortune of needing to use the bathroom, I really didn't want to touch anything and feared someone coming in (I don't remember being able to securely lock the door).
I think there are better diner-esque locations to go to in Madison, but I haven't completely written this spot off.