Hell

There are multiple different hells in the Fine Dining Extended Universe. 
One version of Hell is a special plane run by Luis C. Fernando. It is similar to that of a traditional fire and brimstone hell. It's frequently visited by Nova Sakuga, who is continually sent there only to be kicked out regularly. Allan has been imprisoned there for the foreseeable future, and Don Infusio has been banished there a number of times as well. The same can be said for MatPat and xXG4mer_GabrielXx. This might also be the same hell as where The Demon Sisters are from.
Another version of Hell is ruled by the family of Lilin Yanara and is filled with various types of demons all of different shapes and sizes. This Hell is not necessarily evil like would first appear, and can be quite friendly.
A third version of Hell that is, for better or worse, a real canon thing is Gay Hell, the realm which Blackberry comes from. In contrast to traditional ideas of Hell, Gay Hell is a paradise where everyone can live happily and freely, although there are still plenty of strange and potentially dangerous things there. It was once a terrible dystopia like other Hells, but its corporate overlords were overthrown by multitudes of queer people, completely altering the nature of the realm (and creating Blackberry in the process).