Hey. I am the queen of hens, over the last two years I've been to about 10 LOL! the best was my sister's in Galway, the worse was my ex's sister's hen in Galway.
My sister's hen: Galway, one night. Stayed in Carlton Hotel (very hen friendly have stayed their for 3 hens ....) No activity. I hired a small function room. Did : this s your life video slideshow, memory game, mr and mrs game, how well do you know bride game, wedding traditions quiz . Prizes of bubbles, tiaras etc. Had gift bags for all at it with headache tablets, sweets, tissues etc. Then dinner in Milano and reserved area in the Skeff. Was easy hen night and really reasonable for all. No theme as sister was dead against anything!
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Ex's sister's hen. Also Galway, also the carlton. 2 nighter. Problem was the first night was full on that we were all dying on the second night. people were tired and crabby and hen had a fight w bridemsaids. can't remember much more about it but it was the fight that was bad. dinner in the carlton was also just so so.
Other galway hen- really good apart from the theme on the second night. First night we did bollywood dancing ( again function room in the Carlton). The bridemaids were really strict though. Friday night was a quiet night in the hotel, it was lovely actually and left us in good state for saturday. activity was kayaking which people loved ( except me cos im scared of open water). Then dinner and the skeff again! But we had to wear hi vis vests

Best restaurant on a hen night: Man friday in Kinsale
Best cocktail making: the Landmark in Carrick on Shannon
Worst cocktail making: some place in Kinsale
Best place: moon river cruise in Carrick, so much fun
Best activity; spa weekend in The Osprey in Naas
Best game : making wedding dresses from toilet rolls in my house for a small hen.
My favourite theme: wigs in Carrick ( I had a blue bob loved it), black and bling in Carrick, Rose of Tralee in naas
Last favourite: the hi vis vests! Black dress and crazy tights ( just cos my tights were manky).
Hope that helped!