I could possibly work out four times a week, if I do intervals-but-nothing-else in the small interval (heh) between dayjob and Tuesday night rehearsal. But I always feel rushed all evening when I do that, and I don't need any more stress. Also, afterwards I feel less like I've worked out; doing a set of intervals is indeed work, and I sweat a lot, but then I don't have the longer period of just moving which I enjoy, and which makes suffering through the intervals worth it.
Staying awake through rehearsal is easier if I've had a shower and a change of clothes beforehand.
I have not entirely decided what to do for my birthday, but seem to be defaulting to various meals with different people, spread out over time. And taking a day or two off from the dayjob.