"Hey man, want another beer?" "Need another beer?" "You're drinking slow, catch up!" "Here's some shots"
On the rare occaisons that I drink on my own, I have 2-3 beers, I tend to enjoy them a little more. But in a group, I go at the group's pace.
Part of this is because it's very hard to enjoy the company of people who are much drunker than you. And they won't enjoy you if you are much drunker than them, so you have to all be on the same level.