Parallel Bars

Do you believe in alternate dimensions? I didn't, but after years of extensive research I discovered the gateway to alternate dimensions: bars and pubs.

Wait, now hear me out. At some point before closing time I always slip into a parallel universe. The people and motif in the bar always change. The layout is different because I bump into things on the way out. Even outside my car is never where I left it.

Sleep seems to be the only thing that brings you back to your own dimension.

The only side effect of the journey is a terrible headache.