The Dublin By Bike Tour is informative, but not engaging. It’s like taking a bike tour with Wikipedia.
Dublin by Bike Tour Review | After wasting a day due to jet lag, I had to recover wasted time by seeing a lot of the city quickly. I looked for tours I could book the next day on Viator and found “Dublin By Bike” so I booked it.
FYI: You can find tours with Viator, GetYourGuide and Klook.
If you’ve ever done a good bike tour, you’ll realize how fun and enjoyable it could be while getting exercise. Unless you pick the extremely difficult course like I did in Thailand.
Biking through Dublin is pretty difficult. There’s a lot of people walking around on the street, we’re biking through traffic while avoiding cars, and worst of all it’s on cobblestone streets. Cobblestone does not give you a comfortable bike ride, dublin bike tour review.
We were schedule for a 3-hour tour but took a 30-minute break for coffee (not provided). They did however provide a granola bar.
After a 3-hour tour by bike through Dublin, it was just okay. I didn’t retain anything or connect with any of the Wikipedia information. 
A few hours after this 30 EURO bike tour, I decided to take the free walking tour and found that to be more informative AND engaging.
TLDR;
I should have planned my trip a little better. It’s kind of hard to find things last minute to do in a location without being prepared, otherwise you’ll spend a lot of time looking while you’re on vacation. I later found a list of Irish Music Festivals that I would have liked to see.