in many places, PI is a night in jail. disorderly conduct isusually the same. I've had a few DCs back when I was a bratty 18 year old who played his car stereo too loud (city did not have a noise ordinance, so I got charged with DC-noise...I'd rather have had a noise ordinance ticket)...a night and a nice hefty fine.
Pretty much my thoughs on bikes is they are vehicles, as such I never use them when intoxicated. I may walk it if I am really drunk, but in some states, even that is a DUI, so check your local ordinances and ask a few cops before you go bar-hopping with your bike and u-lock in hand.