From a fighting game community perspective,
The reason a fighting game arcade would not work in Dallas by itself is because the fighting game community in Dallas has its history in get-togethers and gatherings at people’s homes. The last competitive spot for fighters in DFW that EVERYONE went to was the Putt Putt in Arlington and that was surely before the year 2000.
Houston and Austin on the other hand have both always been centered around the arcade with get-togethers as a supplement to that. The hardcore players in these areas have always played casually at home, and seriously at the arcade. That’s mostly due to having well-run, conveniently located arcades (Houston: U of H, then Stargate, now PZ. Austin: Powerplay/Einstein’s, now UFO).
If you open an arcade in Dallas (or anywhere), you should not be opening it just for people who visit SRK. SRK currently has 78,319 registered users, the size of an average suburb split amongst the entire hardcore fighting game community–and that’s not even considering people with multiple accounts, people who only post in General Discussion, and people who don’t play fighting games anymore (this is probably over 50% of SRK).
Of those 78,319, you’d be lucky if over 50 lived in DFW. Of those 50 or so, 30 might not ever go to an arcade even if they had the option to do so. 5 people here might live within 10 miles of your location.
If those 5 people become regulars, is that enough to support your business? Of course not. What you should be aiming for, then, is to open an arcade for everyone. Don’t worry about SRK. Focus on opening a business for everyone (racing, shooting, puzzle, pool/hockey tables, redemption), and if you want to get some of the new fighting games, keep your machines in good working order, hold some tournaments, have a great location in the city so that more people can go conveniently (not a suburb), and the stars are perfectly aligned, you might get some support from the hardcore fighting game community.
What you’re basically asking by creating a thread like this is saying “we’re creating a business but haven’t planned it out, so we want to know if we can have your support just in case”.
From a logical perspective, any reasonable person’s position will be “I have no idea”. Your arcade isn’t open yet, they don’t know how much you’re charging, they don’t know if the machines are in good shape, they don’t know how well-maintained it would be, they don’t know how much competition will be there.
On the opposite spectrum, if you were to create a thread saying “We are opening an arcade on XXX date at YY location with Z available, come check it out if you have a chance”, you’d probably get a resounding “OK!” and people would make their own judgments about your place after visiting.
tl;dr: Expecting the fighting game community to make a decision about your non-existing place is unreasonable, and you’re likely to get far less support opening in a suburb than you would in the actual city.
Ninja Edit: Then again, DFW is suburban hell, so a suburb might be your only choice. Just do your research, I guess.