A.L.
Hi, I am a married mother of 5 and grandmother of 2. For me honestly a tried and true place is Chuck E Cheese. It maybe played out, but even my 9 and 10 year old boys still love going there.
Or Jeepers in Greebelt Plaza. You could also check out the Sports and Learning Complex. I think Chik Fil A also has a birthday party they are located in The Blvd. There is always Mcdonalds, most fast food places offer birthday party options. The Kung Fu school my boys go to offers a birthday party I don't know if you would be interested, if you are contact me and I will give the number to reach them, but they are located in Laurel off Cherry Lane.
You might also consider your local recreation center. The Herbet Wells Skating rink has some party options.
Hope these suggestions help.