Bottle service looks effortless from the banquette. Behind the wall it is a plumbing event. A busy Strip room puts a few thousand people through six restroom stalls in a five hour window. The bar wells drain melted ice, citrus pulp and straw wrappers from ten at night until the lights come up. The dish pit runs hot the entire time. None of that shows up in the photos anyone posts the next morning, and nobody thinks about it until it stops.
Ice is the part most people get wrong. A service well dumps thousands of pounds of it into a drain line every weekend, and cold water carries fat and syrup along until the line cools and the residue sets. Add lime wedges and muddled mint and you get a soft plug two feet past the strainer. Floor drains under the well take the overflow, which is why a bar that smells wrong on a Wednesday afternoon usually has a dry trap or a blocked floor drain rather than a garbage problem.
Most Las Vegas venues also inherit their pipe. A lounge moves into a space that was a steakhouse, which was a sandwich shop before that, and the line under the slab has been carrying somebody else's mistakes for fifteen years. That is why the build-out matters more than the punch list. A.A. Cassaro Plumbing, for one, spells out the commercial side of its work in plain language, listing restaurants and fast food franchises, shopping centers and retail spaces, tenant improvements and build-outs, and new construction. Reading a contractor's own service list is a fast way to tell whether a crew has stood behind a bar back before.
If you manage a room, three things are worth doing before the season picks up. Learn where the water shutoff is and make sure two people on the floor know it, not just the general manager. Have the well drains and floor drains cleared on a schedule instead of on an emergency. Get a phone number for a licensed plumbing contractor into the manager binder now, because two in the morning on a holiday weekend is the worst possible time to be reading reviews on your phone.
None of this improves the guest list or the sound system. It does decide whether you finish the night selling tables or closing a restroom and comping a section, and the rooms that stay open tend to treat the back of house as part of the operation rather than an afterthought.