I've been to restaurants and to the movie theatre alone too.. It's not a big deal, you just sit and wait, lol. You can bring a magazine or something to read, or a notebook or paper to write stuff.. I enjoyed writing in a cool cafe too, made me feel like JK Rowling...
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
People may think you're a reporter or something.. Sometimes you meet someone you know (who's alone too) and may sit together.. Or if there's no room you can share table with someone else and maybe chat a bit.. Or not, as you wish..
I had a few places I was more comfortable going alone too, usually I was there with friends or co-workers first, and then just went alone when I felt like eating there.. And maybe next time I was with someone again.. The waiters were just happy you bring them business!! And some may chat or flirt with you, lol! (Though some of that can be a bit weird, ha ha!)
If I really needed to eat and I was in a hurry... there's just no doubt for me to just go and eat. (I've seen plenty of goodlooking people eating alone too!) You may just be busy and not have time to get together a whole bunch of people to go with, or others may be busy or not have the money, or a whole bunch of other explanations may be possible...
And if I really wanted to see a movie that nobody else wanted to, or had a window of time unexpectedly, and no one else had time then... I just went and watched it. It may be easier if you come a bit late when everyone is seated.. Sometimes friends just have different tastes in movies... (Or some people can be annoying to watch with.) I prefer to watch with friends, if I really like a movie, it doesn't matter.. (Or nowadays you can see it online or on DVD, but not all films.)
A friend of mine (very goodlooking and social otherwise!) even went to bars/'out at night' alone too.. I never dared to do that... Another one went to eg dorm parties (alone) if she knew other known people would be present.. I never dared to do that though, except maybe returning back to friends.. I've even won tickets to cool concerts and didn't go (when everyone else was busy or not interested, or it was last-minute and there were other plans).. So, hm? That's definitely a whole different category for me though...