I was best man at a wedding this past Sunday where the reception was at ADH.
They had about 65-70 guests. They were 20 ppl or so too big for some of the smaller places they liked, so they ended up at the ADH.
If I remember correctly: they had 4 big round tables on the dance floor (I think they sat 8 each?). If you were standing in front of the stage looking out into the room, there were two tables kind of in the back left corner and two in the back right corner of the dance floor.
The DJ had has equipment set up in the back center of the dance floor, directly across from the stage. The newlyweds had a sweetheart table on the dance floor right in front of the stage (which the staff took down once dinner was over and dancing started - I didn't even notice it was gone until much later).
They had smaller dining tables on the next higher level around the perimeter of the dance floor (which is about 3-4 steps higher than the dance floor and next to the little wall/railing combo that surrounds it). Those tables had 4 ppl each.
They also had a buffett, which was set up in the back left corner of the room (When looking out from the stage) along the walls near the glass doors leading out to the balcony.
They had the cocktail hour on the upstairs level of the ADH with some food and the 2nd floor bar open. Then they invited the guests to the lower level for the reception, and when they introduced the bridal party, we made our way down the big staircase and out onto the dance floor.
The way the staff set it up for our 70 people was great, and they could have easily fit twice that many people on that first level. There is a lot of space there that went unused for us on Sunday. The dance floor is HUGE. I haven't had time to look through my pics yet, so I can't post anything for a reference - sorry!
Overall, I will say that the ADH is great location for a reception. Having those private balconies along the water was fantastic - lots of people spent some time out there during the evening. The spacing inside was perfect, the arrangement of the tables on the dance floor and then up around the perimeter was great, and the location on the Boardwalk let us take what I think will be some very cool pictures of the bridal party before the reception.
Very cool place for a reception
Good luck with your planning! Hope this info helps!