I've always thought if you are too sick to work that you are too sick to go out and enjoy yourself. A woman at work was on holiday and didn't come back the next week or for the first three days of the following week - something to do with feeling a bit rubbish (not mental health related) and she has cream and and tablets from the Dr. She let slip that she was in the pub with her friend on Saturday. I just would not do this. If you are well enough to go to the pub and drink surely you're well enough to go to your work.