A guy walked into a bar.
A guy walked out of a bar.
A guy walked into a bar.
A guy walked out of a bar.
Listen up, buttercup. This "joke" is so bad it's almost impressive. A guy goes into a bar, then leaves. That's it. There's no punchline, no twist, just...nothing. You probably think it's funny because you also wander in and out of places without a purpose, like a lost sheep.