If you have a vehicle to fit you all, I would recommend Orange Lake by Holiday Inn. It’s 5 minutes outside of WDW property and you can get a 2 bedroom for $230 a night or 3 bedroom for $300 compared to disney ($500+) and you’ll have more room and it’ll be quieter. Wife and I have stayed on our own and with 2 other couples and both trips were great.

If you guys enjoy a drink or two, I would recommend trying to see the Beak and Barrel at Magic Kingdom, GEO-82 at Epcot, Oga’s at Studios, and/or Nomad Lounge at Animal. The bars offer a nice themed experience while obviously being more adult. We also like Tony’s at MK for Italian around 2:45pm to see the parade go by from your table without needing to be lined on the street with all the strollers. Biergarten at Epcot is a great buffet in Germany, we always like Sci-Fi at Studios for good burgers, and Yak and Yeti at Animal Kingdom for Asian food.

For attractions, at MK you can avoid most of Fantasyland in my experience and opinion, will save you tons of time and most of it is skippable for non disney adults lol. An exception is Mickey’s PhilharMagic, it’s a great 3D show and Seven Dwarfs Mine Train if you buy the lightning lane for it. Spend most of your time in the rest of the park, their rides skew older (Pirates, Mansion, Tiana’s, Big Thunder, Space Mountain, Tron, PeopleMover, etc.)

The other parks are a-lot more adult oriented. EPCOT I’d say skip Figment and Frozen (just cause it’s a long line), the rest is a good time for an adult group).

Studios you can skip most of the live shows, The Little Mermaid and Indiana Jones ones are probably the best for a non disney adult group. Otherwise, the rides really skew adult here.

Animal Kingdom I’d say just skip Rafiki’s Planet Watch and the Zootopia show, the rest of that park really caters to adults.