I did a few rounds of last year's AA FBM series and found it enjoyable even though I had no chance of winning, but I set myself goals of being within n secs of the winner, not being last, trying to hang on the tail of faster guys for as long as possible etc. I am finding the Conedodgers skill league concept interesting and a good challenge for me, it's a regular daily thing but non-attendance doesn't hit you too hard.
The AA series was at a good time of week for me but as has been said, it can be hard to block out the time with other commitments, depending on when they are running. I'd certainly be interested in setting up something similar for FBM XRG/XFG pick up racing that perhaps just takes your best few results of the day - but I'd need to learn how to extract the data and code it all up which would be something of a steep learning curve.