Slot tournaments are booming here.

Popular for a long time in Las Vegas, The Isle and Gulfstream began slot tournaments in July. Since then they have adjusted their offerings and two Seminole casinos have started them.

Basically, casino patrons push on a slot machine button for a set amount of time, and the person with the highest score wins. Participants must belong to the casino’s players’ club.

Gulfstream holds a free tournament from noon to 4 p.m. Fridays, with $5,000 in prizes. But it also is holding its first-ever paid tournament: For $100, you can compete for a first prize of $25,000 from 4-8 p.m. Sunday.

The Isle conducts free tournaments from noon to 6 p.m. Sundays in October, awarding $5,000 in free play.

The Seminole Hard Rock Hotel and Casino has a started the King of the Rock tournament on Mondays at 4 p.m. this month, and it continues through Nov. 10. The tournament pays $1,000 for first. Meanwhile, Players 55 and older can compete from 9 a.m. to 2 p.m. Tuesdays. Cash and free-machine play prizes awarded to the top five overall scores per session.

Seminole Coconut Creek will conduct tournaments at 11 a.m., 3 and 7 p.m. on Tuesday. First prize is $2,000 in free play.