TLDR: I used a false name at a coffee shop that has now become my regular and I don't know how to climb down from it.
I moved to a different neighbourhood at the beginning of the year and my daughter was born shortly after. From when she was a few weeks old I started taking her for a walk in the sling for her first nap of the morning, and increasingly stopping off at a cafe to grab a pastry and a coffee for breakfast. At first a tried a few but settled on one which is objectively the best, and probably go there 2-3 mornings a week. The staff recognise me and we usually exchange pleasantries or have a nice chat.
My problem is that although it's very very rarely busy enough for them to ask for a name for my coffee, the first few times they asked I gave them my 'Starbucks name'. This is the fake name I always use in chain coffee shops as my real one is quite unusual and tricky to pronounce and spell, and it's just way less hassle to say something else to a person I'm never going to meet again. The fake one is vaguely similar to my real name, but definitely a distinct name and not a diminutive. Think Anna instead of Araminta or Sam instead of Sophronia.
Anyway, now the staff remember my fake name and today they greeted me with it. They are really nice and I feel so awkward about it - I don't know how to set it right without seeming totally mad. I'm sure they don't give that much of a shit about me in the scheme of things, but we have a pleasant relationship and I don't want to draw attention to myself as a total wacko. I used to be a barista at a similar kind of local cafe and really enjoyed the relationship I had with regulars - I liked being part of the community in that way. I think maybe if someone had confessed to using a false name I might have found it funny, but I'm not sure.
Changing to a different cafe is not an option, by the way: this one is definitely the best.