STAMFORD — Sugar Ray, the pop-rock band with a string of ’90s hits including “Fly” and “Every Morning,” will perform this week at Alive@Five. The band is headlining the Thursday evening concert at downtown’s Columbus Park. Doors open at 5 p.m. Tickets are $15. Patrons must be at least 21. The night before, The Guess Who will perform at Columbus Park at Wednesday Nite Live.