Really depends.

Typically, $1 is for a standup bar etc with high volume.

If I’m sitting at the bar top, getting fed, I’ll tip like I would were I sitting at a table. If I’m just sucking down beers, probably a buck or two a drink and if I’ve been a while, a 5 on top at the end.

But, I’ve known a lot of people in the industry etc… Also I’ve found that being a good person who tips helps out in the long run, it’s nice getting the occasional free drink, having the server on your side when flirting with folks at the bar etc. Best one was the bartender gave me really high end ski gloves that had been left behind a couple nights prior, the cash equivalent would’ve been huge.

As they say, it’s nice to be nice.