For the purposes of this thread I will doff my moderator's cap (and recuse myself) as I have been involved in the discussion and while the discussion is straying a bit, everyone is being pleasant (please don't change on my account - LOL). I will leave it entirely to the discretion of the other travel moderator, hlywud, as to how, if at all, he treats this thread (unless people become uncivil).
The OP asked "what is an AI" and I think my first post in this thread (numbered as #3) more or less satisfies the OP's question. Virtually everything else is extraneous to the OP's question.
Let's agree:
1) AIs are not for everyone (but then neither are guest friendly local hotels, chica bars, or Dominican novias); we are all different and each of us has the right to vacation in the manner which best suits us without being chided for our choices.
2) AIs, generally speaking are vacations for the masses, but there are some outstanding examples of accommodations and cuisine to be found in the midst of the sea of mediocrity which is common in the ubiquitous AI rooms and buffets. It is simply not fair to these examples, to generalize. IMHO, AIs offer great VALUE for the vacation dollar when compared with doing it all separately, at least from my part of the world.
3) AIs offer a safe haven or sanctuary for the unadventurous traveler but there are increasingly more and more examples of AI tourists who cover their wristbands with a watch and actually walk outside of the enclave. Some of us travel in taxis, publicos and guaguas and yes; some of us even eat in local restaurants, both ex-pat and Dominican and see the local sights without being herded around in those "monster" trucks.
The DR hosts some 4+ million tourists annually (deference to planner but I think this is the target number for 2007) and just over 50% of them land in Punta Cana, an artificial Tourist destination which doesn't even boast a decent town so I can assure you that virtually zero percent travel there for chicas or girlfriends. Puerto Plata (province) starts out with some 14,000+ AI hotel rooms (4500 in Playa Dorada, 1000 in Costa Dorada, 2500 in Cofresi, 1500 in Maimon, 500 in Luperon, 2000 in Sosua, 1000 in Cabarete, 1000 in Rio San Juan) a number which is not close to being rivaled by the small local independent properties. As previously stated the vast majority of these guests are couples and families who are not here to partake of the spicier Dominican offerings of the chica bars. Yes there is a segment of the traveling demographic who are here for chicas but they are an infinitely smaller group than those here for the sun and the overall travel experience. I expect that landings in La Romana and Samana mirror somewhat what happens on the North Coast, where AIs are more numerous than alternate accommodations and I expect that SDQ and STI have many less tourists than the other international airports so their contributions are more negligible.
Those are my thoughts for now.
Gregg