The Notorious rolled into Miller's Ale House in Hollywood, FL and turned up like he celebrating -- going behind the bar, taking pics with fans ... and even cooking steaks in the kitchen!!!
Seriously, we spoke with people at the bar who tell us Conor wasn't there to be served, he was there to WORK!
Of course, Conor was pushing his Proper 12 whiskey -- ordering up 100 shots for the people in the bar -- and even buying a couple of bottles for himself (he likes it).
When it was all said and done, Conor's bill came out to $636.