Jigjag, I hope you have a good time at mcdonalds/mcdonald's/McDonalds/McDonald's/MacDonalds/MacDonald's. I bet you wish the Wimpy was still in business?!
My friends and I all write to each other as Anne Smith, Mary Brown etc. My daughters do the same and I'm delighted that this is seen as normal to their age groups. My mother and mother-in-law were horrified (both at me and their grand-daughters), but I told them the world moves on. I strengthened my argument by pointing out that they had lived in a time when it was considered normal to address a married woman as Mrs John Smith. How ludicrous was that?
If I'm forced to give a title, I'll use 'Ms' - it doesn't sound as odd now as it did 30-odd years ago.