You never know who will end up sitting down next to you at a bar...especially at the odd and off times...like 2 p.m. on a week day. Your judgment may or may not be so great, depending on how long you've been sitting there drinking. When the guy next to you at the bar starts ranting about how he'd enjoy beating the shit out of this or that guy because this or that guy kept putting his arm around him...well...order one last shot and drink it and leave. That's my advice. You just can't know who you should say hello to. You can't quite finish your beer quickly enough when he mentions he sleeps with a shotgun next to his bed (which means he's probably got a gun on him). You can't signal the bartender quite quickly enough when the guy seems to welcome the destruction of the world markets and the world in general. You can't scratch out a tip amount and a total and a signature on the credit card voucher quite quickly enough when he boasts that he actually earns his best commissions during times of disaster. The best you can do -I guess- is pay your tab, drink up, wish the guy the best of luck and walk out.