Humans in general are much bigger compared to hundreds/thousands of years ago. Our bones are bigger, we weigh more etc. Mainly due to more food/nutrients and other health variables. People in 3rd world countries are typically smaller... shorter etc. due to lack of essential nutrients. But I think one day in the next few hundred-thousand years, 6'0" will be the average height. There's a lot more people pushing 7'0" tall these days than ever before. It's kind of scary... if humans keep growing, we'll be like giants one day
And the reason those people in the bar that you saw look small is probably because they are mostly underage with fake IDs lol.