Wisconsin OWI laws primarily apply to motor vehicles and they do not specifically mention bicycles. That said, there is some ambiguity regarding whether biking under the influence could have any legal consequences. Currently, the state’s OWI laws do not specifically address intoxication while cycling.
This means that technically, it is not illegal to cycle and drink. It is not, however, a good idea to do so. If a drunk cyclist causes a crash with a motor vehicle, the injuries are more likely to be severe or catastrophic. Despite being injured, a cyclist in this situation may also be at least partially liable for damages resulting from that crash.