It appears there were two locations, one downtown and one on the LV Strip. The subject has been discussed on the bb before but I can't recall the details. It may have been the same owner at different times.

Here is a scan of another match from the same location as you show. There's also another from the Fremont Street location. I think the downtown cover is a bit scarcer, but both are front-strikers so probably pre 1972. The downtown one doesn't have a phone number which seems strange for a place that takes phone bets, possibly it was just a bar?