Creedo,
A couple of years ago, I suggested wifi to a local poolhall as part of an overhaul to attract more customers. The establishment didn't have internet, only cable TV. I worked with the owner's son, together we found these pitfalls. In the end, the owner opted to re-cloth a few tables, moved tables around, and flipped cloths on the rest.
The OP can make his suggestion, but the business owner needs to justify the expense in additional customers.