The Fugoo XL appears in some of Oluv's reviews and comparisons, it is a really small speaker, roughly comparable with the Beoplay A2 or a bit above. That means it's like the small Bose Sounddocks at best, or like B&O Beolit 15, but less refined.
I have used such speakers for very small congregations in chapels, but only if the audience is quiet. As soon as there is chatter, it won't suffice. The Klipsch KMC-3 is a lot stronger, next level would be Beoplay A8 or A6 or Bose Companion 50, probably Teufel Boomster XL or Aiwa Exos-9 in the same class, and Bose Sounddock 10 still louder.
You can compare the Fugoo XL to some others here in Oluv's tool. Select Fugoo XL and another speaker and "maximum volume".http://switcher.oluvsgadgets.net