I go to shows alone all the time.
I just moved to the city a month ago and don't know anyone here yet (my job doesn't start for another week and a half) except for my roommates whom work 14 hour days.
Besides, I am all about discounts, rush and lotto which is harder to coordinate with a group. I am able to just go see a show on a whim instead of trying to work around a bunch of people's schedules.
And when I feel a deep desire to discuss what I've just seen with someone, I hop on BWW via my Blackberry and discuss away.
"You just can't win. Ever. Look at the bright side, at least you are not stuck in First Wives Club: The Musical. That would really suck. "
--Sueleen Gay