NEW YORK — Going out to eat might feel a little different these days. Maybe you're waiting longer for a table, even though the restaurant doesn't appear full. Or maybe your service is slower, and your server seems anxious. That's because restaurants across the United States are understaffed, and jobs that were already stressful have gotten even more difficult. Workers interviewed by CNN Business said they're struggling in the short-staffed environment. Servers are stepping into other roles as overworked back-of-the-house employees quit, and sometimes seeing their tips ebb as they scramble to keep up with the new responsibilities. Fed-up colleagues sometimes quit in the middle of their shifts.