How to Avoid the 5 Most Common Dining Room Decorating Mistakes

DINING ROOM décor gone awry can kill appetites. Whether your guests are flinching from an eerie portrait their chairs face or squeezing into too-tight seats, bad decorating can take the joy out of even the most well-concocted meal.

Los Angeles-based designer David Netto believes dinner guests are rarely eager to enter these stuffy rooms. “So what a dining room must have, above all, is atmosphere,” he said. Here, interiors pros detail five mood crushers in dining rooms, and palate-pleasing alternatives.

1. Blinding Lights

Ample light helps diners distinguish between mashed yams and potatoes, but cruelly aggressive bulbs inspire squinting, not conviviality. “Nothing will kill the vibe of a dinner party faster than harsh overhead lighting,” said Marina Medina, a Vancouver-based interior designer. No one feels good under 5000K LED bulbs, says Susane Jory, a designer in London, Ontario, “and few of us look good bathed in it.”

Instead: Kelly Finley, a designer at Joy Street Design in Oakland, Calif., relies on “recessed lighting on a dimmer, a chandelier with soft lightbulbs and wall sconces” for a softer shine. Mark Eckstrom votes for the old-timey romance of candlelight. Said the co-founder of Studio Eckström, in Omaha, Neb., “Every guest at your table should have faces aglow.”

2. Tasteless Walls

Think of a dining room’s walls as a platter on which dinner is served. Sterile white dishes with a hospital vibe often don’t flatter food. Nor do chaotically patterned ones. Similarly, when it comes to walls, some color can help, but Mr. Eckstrom returns to the effect décor has on complexions: “Sorry, but nobody looks good in a yellow or chartreuse room.” And Brian del Toro, a New York City interior designer, warns against surfaces with “overly active patterns, colours which are too bright or distracting, and combinations of the two, which aren’t soothing.”

Instead: Save the pattern-on-pattern alchemy for the powder room, and pursue colors like terracotta, rose and aubergine that Mr. Eckstrom says “stimulate appetite and reflect well on guests’ skin.” But know that naked walls don’t make people feel comfortable and sociable either. “Every seat should have a view—a window, art, sculpture, wallpaper, mirror, flowers,” he said.

3. Prissiness

You won’t feel inspired to plop down at your dining table for a casual brunch if it’s surrounded by austere crystal chandeliers and dusty mahogany sideboards. Mr. del Toro finds that most dining rooms skew too formal, dark and “limited,” appealing only for an evening dinner.

Instead: “Most of us lead relatively informal lives,” said Mr. del Toro, who likes dining rooms casual enough for sipping a smoothie or morning latte. Chris Goddard, an interior designer in Springdale, Ark., said he’s partial to installing weathered wood tables that, while inherently chillaxed, can be “dressed to the nines for a festive dinner.”

4. Sound-Bouncing Surfaces

When you ponder your dining room’s décor, remember that happy repasts aren’t silent. Poor acoustics can turn animated chatting into cacophony, said Olle Lundberg, a San Francisco designer. “Hard surfaces like stone flooring, plaster walls and large windows all bounce the sound back into the space, creating reverberation,” warned Mr. Lundberg.

Instead: For a more discussion-friendly space, Mr. Eckstrom prescribes a blend of softer materials like drapery, carpet, tapestries or a tablecloth “that help absorb echoes and promote conversation.” Mr. Lundberg goes further, endorsing the idea of covering walls with fabric or draping it from the ceiling. Many textiles come in “large formats and can often be installed seamlessly,” he said.

5. Failures of Scale

In a dining room, ill-fitting furniture is more than an eyesore—it can result in stubbed toes and dry-cleaning bills. “If you’ve placed a giant table in a small room,” said Ms. Jory, “your guests will invariably be wearing the soup as you squeeze behind them with the gazpacho.”

Even the size of a carpet can throw a wrench in the roast. “Rugs that are too small pinch the overall vignette,” said Jessica Lynn Williams, founder of Hendley & Co, in Newburgh, N.Y., who adds you should never force your guests to scooch their chairs awkwardly over the edge of a too-tiny rug.

Instead: An occupied chair should ideally have 3 feet of space behind it for proper circulation and flow, said Meg Lavalette, founder of Lava Interiors in New York City. And carpets should accommodate sliding chairs—without giving them any lip. Laura W. Jenkins, an interior designer in Atlanta, says that when it comes to light fixtures and rugs, she prefers to err on the side of a little too big.

DIGESTION IMPOSSIBLE

Designers recall meal-spoiling decorating gaffes

“Once I saw a light fixture that hung so low and so close to the edges of the table that even the older kids in that family complained about bonking their heads against it!” —Noz Nozawa, interior designer, San Francisco

“I tried to convince [a client that] even though red was his favourite colour, it wasn’t a great choice for a dining space and that we could bring it in through other avenues—décor, rugs, wallpaper. We ended up not taking him on because he couldn’t get past the red for the dining room, but it was so bad.” —Shaolin Low, interior designer, Honolulu

“I was once seated in a dining room with a table that was too small. The chairs were covered in Fortuny, but not even the chicest choice of fabric could keep my knees from bumping against the person who was sitting next to me.” —Michelle Nussbaumer, interior designer, Dallas