This reminds me of the "old days" of my gaming in the 80's at a Denney's restaurant. We played D&D or Champions, among other systems like Fringeworthy after ten once or twice a month. We didn't use miniatures much and it added to the amount of character work we did. Actually, we gamed there to do Role Play without too much of the "roll play". The manager let us game over night on coffee and sodas, knowing that we'd buy breakfast (for dinner) before we left. Also, more people filtered in overnight if the parking lot had a few cars.
We were normal teens and university students of the time. That meant loud color shirts, blue jeans, and one of the late joiners went Cindy Lauper. (Don't faint, we had three women gamers. Call Colleen a girl and she'll give you a frog!) Add to that being in Indianapolis. Most people at the time equated dice with gambling and we had loads of D6 on the table. It took two months before the cops became casual. One even said his son played.
At first we'd get a wide birth from having books with "Monster Manual", "Vampires" and "Villains" emblazoned on them. Sometimes there'd be "blue hairs" scowling from across the isle. We didn't get any other problems.