Texas Tiki Disco sounds more like word salad than a plausible nightlife concept. But the temporary takeover of Lost Lake by Houston’s Anvil Bar & Refuge—during a week when the bar’s usual honcho, Paul McGee, and his staff are on a research trip to Martinique—is quite charming and not at all desultory. On Monday night, the bartenders and servers donned cowboy hats and aloha shirts. A mirrored ball dangled from the ceiling next to taxidermied blowfish. The soundtrack played like a Time-Life disco compilation—Chic, Bee Gees, Donna Summer—garnished with some dusty outlaw country tunes for thematic coherence.