It strikes me that most NBA fans get to games in cars. That's just the way it is.
One fun part of the parkway at night: Skunks.
Honestly, I don't think you will ever, in a million years, get more than 10 people to ride bikes to an NBA game, especially in this town. Oh, it may happen in New York, but that's about the only city where I think it'd happen.
I can just picture it... Family rides in from Orangevale to see a game, leaves the overtime affair, on bikes, at 10:45. Gets home at midnight, with zero mishaps on the way home. Everyone gets up at 6 am the next morning to get to work and school.
Sure. That'll happen.
And if you carried more than 2 loads of people from, say, 5 miles away on your rickshaw, within 4 months, you'll be the fittest person in town.
In this location, I think the only real answer is busses, either directly to your neighborhood, or to the light rail station near Woodlake. It will be far too expensive to run a light rail spur from Woodlake to Cal Expo. So they will have to widen 80, and improve those offramps... Which they eventually have to do anyway.