Varies with the base beer style. Significant astringent, phenolic smoke-derived harshness is inappropriate.
BJCP 2008:
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Examples:
Alaskan Smoked Porter, O’Fallons Smoked Porter, Spezial Lagerbier, Weissbier and Bockbier, Stone Smoked Porter, Schlenkerla Weizen Rauchbier and Ur-Bock Rauchbier, Rogue Smoke, Oskar Blues Old Chub, Left Hand Smoke Jumper, Dark Horse Fore Smoked Stout, Magic Hat Jinx