What things are not going well? Is it interpersonal, technical, slow economics? If there is a way to address the issue at hand, it will raise your spirits and others’ morale. Try to be proactive and offer resolutions or distractions. I once had a short freelance gig modelmaking on a super tight deadline for a nazi architect. EVERYbody was like a zombie in there. One night, some of us had drinks and little by little everyone let out all their frustrations. After that, I swear, everyone was a lot lighter. A weight had been lifted. Sometimes, the place of work isn’t the place to solve the problem.