Family photo session (las Vegas): Small Indoor Space/venue in downtown Las Vegas

We’ll be taking our family photos (about 50 people) on the day of our wedding (Sunday, June 21, 2020). Does anyone have any recommendations for small, indoor, air conditioned spaces that are available to rent by the hour in downtown Las Vegas? We’re looking to rent the space for 2 hours and set up a small backdrop or do simple lighting/decorations on a wall/section of the space for the photos. We’re not really looking at anything fancy. I’ve just sent off an email to The Doyle to inquire about pricing, but I’d like to get recommendations on other places as well.

Also: would anyone have any previous experiences with just booking a conference room at The Cal or Main Street? We’re considering this since we’re not super particular about it being fancy or anything.

Thank you!!