more obscure sport recommendation: LARPing
Andrew already does...
Wal-Mart Polo Bike
http://www.walmart.com/ip/Mongoose-Detain-700cc-Men-s-Street-Bike/15711162
Wal-Mart makes polo specific bikes now (although not marketed that way).
Looks like we'll all have to find a more obscure sport to play.
An older version of this thing popped up a couple years ago (also from Wally world). It was garbage, poorly built, cheap, easy to break non standard parts.
I purchased and reviewed the Mongoose Cachet single speed bike from Walmart a year and a half back.
http://urbanvelo.org/mongoose-cachet-review-150-walmart-bike/
For what it's worth I sold it to a local polo player for $50 after the review, and he used it as his polo bike up until fairly recently. It's still going as some sort of city bike.
I ran across this one too at walmart here in kansas. it was priced at $89 actually and it's free wheel
http://fixcraft.tumblr.com/post/9278648546/ran-across-this-at-a-walmart-...
wally wally wally wally wally wally world!
SOMEONE EMBED THIS SHIT FOR ME!!!! -thanks
oh god, i almost forgot about that video
this doesn't seem polo specific, (unless you mean it's pre-junked!)
more obscure sport recommendation: LARPing