Q1 2018Q4 2017Q3 2017Q2 2017Q1 2017
Same-store sales growth-4.9%-5.9%-1.3%1.1%2.2%
Walk-in same-store sales growth-4.8%-6.4%-0.9%1.1%2.4%
Special events same-store sales growth-6.4%-2.9%-4.8%1.9%0.6%

Notes:Same-store sales, referred to by the company as "comparable store sales," includes sales from locations open more than 18 months