Oh yeah, EUR5.20 in places, Galway would be as good a choice, what is it with fake tan (but ugly is a bit harsh); however, depressed, nah (IMO), I was at a EUR150 for two restaurant on Saturday night, about half full for the first sitting and plunging towards full when I left as the second sitting began to roll in. EUR10 each comedy club was very busy as well.
Another good early bird is Saba but there are lots of these so keep your eyes open.
i don't know, there seems to be a lot of hatred here towards dublin. i rather enjoyed drinking there. than again, i am from the states, and so i wouldn't know the particular ins and outs and culture of the region so much as the others here.
seriously though, i had an awesome time there, and there was plenty of culture and plenty of boozing. if you're worried about spending too much money there, here is a list of FREE places in dublin to see/visit/pass out on the sidewalk in.
luckily you mentioned that you like museums.... it is good to meet someone else who likes a mixture of the binge drinking, the sports, and the museums. they don't usually go hand in hand. so congrats, and enjoy your 21st!
jon