I'm not sure how people are seemingly confusing this lounge with its sister in Terminal 3. When comparing the two "Priority Pass accessible" lounges at LAS (affectionately titled 'The Club'), this one in Terminal 1 is clearly the lesser of the two for many reasons.
It's pretty tiny in size compared to the other lounge in T3 which is accessible via the Red Line. The lounge literally comprises of a small seating area, work area, open bar (redeeming factor here), and some instant snacks. You won't need to walk for more than 30 seconds and you'll have already seen everything in the lounge.
The Club at T1 offers less in space, food, and amenities. At a certain point, it felt like being stuck in a tight space inside. Overall, it's okay to drop by if you have access and your wait time is about an hour or less. Any longer and it makes more sense to go to The Club T3 which offers MUCH more for the same price.
A bit sad that this lounge was fairly forgettable. Wait staff was super friendly though so I do want to acknowledge the LAS hospitality. It just doesn't live up to its sister and other competitive lounges at other major airports.