Six Flags Entertainment Corp. SIX reported Monday first-quarter results that beat expectations, as attendance slipped but spending by theme park guests increased. The theme park operator’s stock was still inactive in premarket trading. The net loss for the quarter to April 2 widened to $69.9 million, or 84 cents a share, from $65.7 million, or 76 cents a share, in the year-ago period. That beat the FactSet loss consensus of 89 cents. Revenue grew 3.0% to $142.2 million, above the FactSet consensus of $132.6 million. Attendance declined 5% to 1.6 million, while total guest spending per guest increased 7.2% to $80.88, as…
