Here's a different angle....
(and since I'm backwards, follow me from right to left)

*The partial roof on the far right is the Las Vegas Club

*Then an alley between the LVC and 22 Fremont St. (The section of 22 Fremont that is next to the alley used to be 20 Fremont...the two buildings/addresses were combined) 20 Fremont used to be Buckley's Jackpot Club, Mecca Slots, and the Golden Goose Casino (and the State Cafe).

*The next section of roof is the rest of 22 Fremont St. This part used to be the 21 Club, Barrel House Club, Golden Slot Club, Cecil Lynch's Fortune Club, Goldie's, and the Glitter Gulch.

*The next section of roof is 24 Fremont, never housed a casino as far as I know.

*The partial roof on the far left is 32 Fremont St., Mermaids...formerly Sassy Sally's, Sundance West, Gambler's Hall of Fame, Carousel, Silver Palace, and the Las Vegas Pharmacy.