Carlos,

I like your site!

In Las Vegas, there was the El Rancho Hotel & Casino at 2755 Las Vegas Blvd, that opened in 1982 and closed in 1992...that's where your white $1 chip is from. Here's a couple of scans for you

Your other chips are from the El Rancho Vegas, on Highway 91 (Highway 91 was an earlier name for Las Vegas Blvd., now usually just called The Strip ). It opened in 1941 and burned down in 1960. Here's a scan from the morning after the fire...

Here's a couple of other scans for you...

El Cortez

Four Queens

I saw red X instead of pictures for the Bird Cage and the Carver House