I've seen that a lot at open mics, and often, if the person who is running the open mic isn't paying attention, they'll hog the show and take up huge amounts of time. Lots of preening before they start - tuning the guitar, long introductions....If it's "two songs" they'll pick the longest two songs they can find. It's the same phenomenon of very unnattractive people who think they're really good looking. Must be nice to live in that kind of alternate reality.