To give you an idea of my age compared to yours, I just missed the cutoff when they changed the legal drinking age in MD to 21 from 18, so I had to go to DC. Regarding the Turtle, I thought their original location wasn't at the mall but rather down off some road on Rt 198 right near the interchange for I-95. If it originally was at Laurel Mall, then bad on me, since once I got my license, I went there more times than I can remember.
Do your memories of College Park include the Terrapin Taco House? I worked there off and on from '86 through about '93 or so (I was going to school part-time and working to pay my tuition, so between that and having no clue, I ended up on the 8-year plan),
and many nights after closing I would go down to the Cellar (didn't like the Vous, too trendy), where the guys that worked the opening shift would be closing down the place. They had some sort of connection there and I don't recall ever paying for beer when I went there.
I finally moved out of College Park to AA County, and didn't realize how many other PG County transplants were already there. There is also a Greene Turtle ~3 miles from my house, and I've been there twice, and once was because an old friend from the neighborhood came up to visit from out of town.
TBH, I'm more glad that Ledo's has also expanded from their original location, and there's one close to my house. One of my prouder moments in life is that my oldest son likes their pizza as much as I do; the rest of the family is pretty about it.