Highside is the name of a bar (motorcycle bar) not biker bar but a speakeasy type motorcycle bar. james dean/Steve McQueen, 50's era motorcycles. 30 to 50 something crowd, local neighbourhood bar.

The motorcycle road racing term used to describe a crash in which the bike is leaned over while cornering and flips back up towards the outside (i.e. the high side). A high side usually occurs when rear wheel traction is suddenly lost and the rider's panic causes him to abruptly close (chop) the throttle. As a result, the rear wheel suddenly and forcefully regains traction, violently flipping the bike away from the direction of lean and throwing the rider skyward. Most racing injuries occur as a result of a high side since the rider has much further to fall.