What if non-seniors are still in the restaurant though? Do they get kicked out before they can finish their meal? No one under 65 can enter until senior time is over? That's ageism in reverse and it isn't legal for a business that serves the general public to refuse service to anyone because of their age. Read the following article:
The Right To Refuse Service? Businesses and Discrimination
You've posted before of the idea of special senior dining rooms, or something like that. If I understand you correctly, you'd like to eat out again and being in a restaurant with only seniors as your fellow customers would make you feel more comfortable. I don't expect to change your mind on that, but that would only be an illusion of safety. There is no guarantee that seniors are practicing social distancing any more effectively than the general public at large. Some seniors have been spending time with their grandchildren, too.
With all due respect, I believe you've said that you've only basically done curbside grocery pickup since March. Since March, I've been inside various grocery stores once or twice a week at various times. I went inside Dillard's on the first day they were open this month, within the first half hour. I've been inside a few restaurants for carryout food once or twice a week at various times. I can assure you that seniors have been present in all of these places, exposing themselves to the general public, many of them not practicing social distancing in the least, even going the wrong way down the clearly marked aisles at Walmart. My point is, seniors as a group aren't necessarily isolating themselves to the degree that you and some other forum members may be doing. Therefore, seniors as a group aren't any safer to be around than most age groups.
YMMV, but in my area, I'm never forced to shop or dine out during crowded times. If I would normally patronize a business when it's crowded, it's usually by choice and only for a special reason. Even the most popular places have slower times, especially during the work week. Even Walmart has slower times, but those are fewer than other places. Right now, the new social distancing requirements make everything take longer. Put on the mask. Read all the new notices posted on the doors. Am I allowed to enter and exit via the same doors? Maybe not right now. Will there be a line waiting outside when I get there? I haven't had that displeasure yet.
Look for the social distancing markers on the floor to know where I'm allowed to stand and which way I'm allowed to walk. It sounds ridiculous, like we're all children who need to be directed by the grown-ups, but that's the new reality.
Back to restaurants in particular. I've read varying accounts. Some restaurant dining rooms have chosen not to reopen, but remain available for carryout. I haven't read that tons of restaurant dining rooms have been filled to their new reduced capacities. Many are still operating with reduced menu options. I haven't dined out yet, but would be willing to. My birthday is next week and I'd like to dine out at a full service restaurant, not necessarily on the exact day, but as my family's work schedules will allow. However, it won't happen because of different work shifts and different days off. It is what it is and at least there's still carryout. It will be my first time doing an online order with curbside pickup at a full service restaurant.
DD didn't work on Thursday, the first day dining rooms opened in Ohio. She heard it was fairly busy for dining in that day, as if people just had to get it out of their systems right away. She said they had no more than 3 tables continually occupied throughout her shift (7 AM to 4 PM) yesterday. There's a new posted reduced capacity of 54. It was also raining continuously all day, so that could have kept more people away. They have a couple of new large signs for designated curbside pickup spots, where most of those customers seemed to be parking anyway.
From what I've seen and read, restaurants aren't expecting people to start flocking to dine in all of a sudden. They're still prominently promoting online ordering, carryout, curbside pickup, and delivery. DD said that they've been having a noticeable increase in Door Dash orders lately. Of course, they want people to come and dine in, just not too many at once please, because that's not allowed right now.
I'm not trying to convince anyone to expose themselves to an environment that's not comfortable for them. I'm (probably unsuccessfully) trying to put to rest this idea that a restaurant (or any other business) is going to create special senior hours during their regular hours of operation. It's not legal. (Hence probably why senior grocery hours are outside of normal store operating hours.) It's not practical. It's not necessary. Dine in when it's less crowded. Avoid lunch break hours. Avoid peak dinner hours. I've done this successfully before COVID-19, even at popular places that are usually packed during peak hours. Enjoy some carryout. Or don't. It's a personal choice. Your choice does not bother me as long as you don't get to choose to prevent me from dining out when you do. That's where the line should be drawn.
Next time anyone is tempted to refer to younger generations as "special little snowflakes" or something similarly derogatory, remember that they're not the ones wanting businesses to cater to them with special senior hours or even entire senior shopping days, as has been suggested on this forum by a few. Pot calling the kettle black as my beloved late grandmother used to say.
