Aren't you comparing the ratio of males and females in the bar to the ratio of matches/messages for males and females on the apps? I'd guess males are initiating contact more than females in bars as well, unless things have changed?
Both cases would be gender-skewed. But to have the bar scenario be as skewed as the app, one man would go home with all the women in the bar. This is not the case in reality.
There are physical limits that prevent skews from being as extreme as in apps.