This image is from: pokermix.net This logo seems to be Garamond or Goudy. It seems to Kerning between the r,a,n and in casinos it seems to be in a,s and i. By making the A and S makes the logo different and eye popping.
This image is from: planetperplex.com This logo seems to Arial rounded or Stone Sans not sure. I like the extension in h, a, and k giving it wave look and the teeth in the S and circle in the eye really makes it look the a shark.
This image is from: flickr.com/google.com It not 100% sure but some characters look like Baskville. The curve on the ends of the h, a, l give it elegant look.