We used to have a place like that around here. There was an old mx track, and the owner of the track lived right next door. If you wanted to ride, there was a coffee can, a key, and a waiver on the front porch of the house. You just tossed $5 in the can, signed the waiver, then took the key and rode all day. when you got done, just put the key back when you got it. It was all done on honor system. It has closed down in the last year or two, but it was really cool while it lasted, which was for alot of years.