Yes, almost all in Atlanta, but some fleets will occasionally have one or more of the weeks off-site (MIA and LAS have been past locations, but you don’t get a vote.)

Not sure what the post-Covid world will look like, but before Covid, the wait between the 2-week indoc and the 4-weeks of sims was between 1-2 weeks. The more senior you were in the class, the closer to the 1-week wait you had. (In theory, the senior pilot will get off new hire pay a little earlier, if only by a couple of days).

I’ve been through 3 long-courses at DL - every time they start your week in the later sim times, and gradually start each day earlier as the week goes on. It makes for a little longer “weekend” if you want to go home. (For example, you might finish at 1100 on “Friday”, but the next event starts at 1500 on “Monday”) But that also makes for a very busy week with less time to prepare for the next sim than you might like.

Also, the new-hire dinner is (was?) usually the Evening of the first day of the second week. It’s a very classy catered event in the flight museum, under the wing of the 767, and the company will fly your spouse in for free, and can stay in your hotel (obviously). I highly recommended bringing your spouse - you’ll regret it if you don’t.

One final note, once you have your type rating ride (called 44X), you will probably start OE within a couple of days (Covid-related backlogs have pretty well gotten back to normal). Training Planning “owns” you until you are OE complete in your base, which will probably be 2 3- or 4-day trips, maybe separated by only a couple of days. It can be a long slog for the family…