The most popular slot machines currently being played in Vegas include the Lightning Link, Dragon Link, Fire Link and Lock it Links slots, in fact most slot machine designers these days are launching similar slots to those, as players seemingly cannot get enough of them.
In fact, over the last couple of years and much more so right now, many land based casinos are setting aside a dedicated area of their respective gaming floors and packing them with those types of slots, and you will often find a Link Lounge available at most casinos, in which you can play each of those slots featuring some form of link type bonus game.
As for the reason slot players are playing them in huge numbers, well that is due to each of them offering players a new type of playing structure and a bonus game on which some mega amounts of cash could be won, once those bonus games have been triggered and awarded to players.
It also appears that a fair old chunk of those slot machines long term expected pay-out percentages are made up via the bonus game winning pay-outs, and as such it is the bonus game that players will be hoping to trigger when playing them.
Some of the most popular Link Lounges as they are known in Las Vegas include the brand new The Strat Link Lounge in fact one player just won big in the Strat Link Lounge just the other day, and the IT Casino Link Lounge is also worth visiting if you are in Vegas too.
Just keep in mind though that such slots will be designed as fixed line slots and as such require players to play for a set number of coins per spin, rather than being slots on which you will find optional pay-lines with very low staking options.