Any business owner who lets customers (guests) run the owner's business will soon be a pauper and die in ignominy.
@Adelle5 , you are right to ask this question. Your house, your business, your decision.
In general, business questions can be easily answered by "the market". That is, what does your competition do?
I find it is easiest to match the market. Less stress, less thought, less hidden risk.
You can be successful without wifi, but you will need to compensate (better experience, lower pricing, simplier offering, clearer marketing)