Iwatani Corporation of America ZA-3HP Portable Butane Stove Burner
and
Dual Sided Hot Pot With Divider
I prefer gas to electric, i also do not like the idea of a wire running from the table to an extension cord that is heating up a boiling pot, when ppl love to trip on shit.
You want a two sided pot cuz one side for spicy one for regular, and a few skimmers, you should be all set.
One pro tip is to always provide baby bok choy. It really absorbs soup base really well, so when guests use it, it'll taste great.