You might get free tickets if they offered you a promotion when you booked the room. Otherwise, you can ask about discounts when you check in, but they do not give all their guests free show tickets just for staying at the hotel.
'Love' is also great but probably means more to true Beatles fans I've never been a Beatles fan, but I thought Love was fantastic.
And honestly, if you're thinking about O, then I suggest L Reve. It took the idea of O and pushed it further into a more entertaining and cohesive show. O is ok, and was incredible when it first opened, but the show has a tendency to lag, especially when the clowns are on. Le Reve used the director of O, La Nouba, Alegria, Mystere and Quidam, so it's not like a major departure from Cirque. Same style and format as O, but better use of space, staging and technology. O has the edge on creativity in costumes and makeup, but that's about it.
Le Reve at Wynn
"What can you expect from a bunch of seitan worshippers?" - Reginald Tresilian