From Wikipedia: Saint Patrick's Day is a cultural and religious celebration held on 17 March, the traditional death date of Saint Patrick (c. AD 385–461), the foremost patron saint of Ireland.
The day commemorates Saint Patrick and the arrival of Christianity in Ireland, and celebrates the heritage and culture of the Irish in general. Celebrations generally involve public parades and festivals, cèilidhs, and the wearing of green attire or shamrocks. Christians who belong to liturgical denominations also attend church services and historically the Lenten restrictions on eating and drinking alcohol were lifted for the day, which has encouraged and propagated the holiday's tradition of alcohol consumption.
Saint Patrick's Day is widely celebrated by the Irish diaspora around the world, especially in the United Kingdom, Canada, United States, Brazil, Argentina, Australia, and New Zealand. Saint Patrick's Day is celebrated in more countries than any other national festival. Modern celebrations have been greatly influenced by those of the Irish diaspora, particularly those that developed in North America. In recent years, there has been criticism of Saint Patrick's Day celebrations for having become too commercialised and for fostering negative stereotypes of the Irish people.
One of those negative(?) stereotypes is of course imbibing alchohol --green beer in particular (mostly a US tradition rather than Irish). I personally NEVER drink beer with coloring (unless that's all I have -smile) -- but if you must, go ahead.
Here are some US beers that you might want to drink.
http://homebrewrockstars.com/top-10-st-patricks-day-beers-made-in-america/ -- American Beers for St Patrick's Day
https://www.buzzfeed.com/emofly/st-patricks-day-guinness-alternatives?utm_term=.umb1bvWqN#.uyAx34EW7 -- American Stouts
Of course this page does NOT focus on beer -- just some naked/semi-naked St Patrick's Day revelers
https://www.sexyandfunny.com/watch_video/violets-st-patricks-day-bikini-strip_75581.html -- St Pat strip
https://www.redtube.com/21613 -- Irish? girl strips on St Pats Day
Enough of the "wearing of the green" for now
(BTW -- that's from a song about the losses the Irish took during the Irish Rebellion of 1798 -- one of many)