Don't know what hotel we are in...but found a few bars in Essen...
there is Cafe Cuba (a Reggae Club), Porn club (not actual porn...House, Deep House, Trance and Techno music), Temple Bar (a modern funky looking irish bar), Flamingo (house and disco house music), Anyway (rock bar), Zeche Carl (gay bar), Nord (rock bar).
So...get googling them...see if we are near any