What's funny is the last time I dove with Ocean Divers (March 2010), they crammed 28 people onto their 46 Nekton. We waited almost an hour on the boat in the sun for the South Beach divers to finally show up. We encountered large swells, lots of n00bs, 5 people vomiting over the rail, an avalanche of dropped weights and bicycle kickers that stirred up the sand so much that many could not find the boat. 28 jumped in and only 24 returned to the boat. Never again.
I avoid South Beach days at OD like the plague. Newtons are rated for 36 divers, I think, so 28 is still within the limit. Crowded? yes. South Beach divers? Run away. When I first moved here, I went out a few times when SB was on the boat. Always late. IMO they do not respect OD for the service level they receive. I applaud anyone that wants to learn to dive, so don't take it the wrong way. I just saw the way SB instructors treated OD folks, and I did not like what I saw. To keep the boat - and other paying divers - waiting is just plain wrong.