Many of the condo hotels have 2 bedroom suites available.
Hilton Elara, non-gaming at the back of Miracle Mile shops with Planet Hollywood in front is nice but can be expensive and has two bedroom suites. The one bedroom has a queen size sofabed in the living room.
Jockey Club is center strip with 2 bedroom suites available
The Desert Rose is not far off-strip, (map on the page is wrong)
Just use booking.com and browse through offers for two bedroom suites or condos.
Look for 5 or 6 people and they are easier to find. You might miss a few with only King beds and no sofabed
The Rita Suites at 344 E Desert Inn
Tuscany at 255 East Flamingo Rd.
Hilton Grand Vacations Suites 455 Karen Avenue, 2 BEDROOM 2 KING SUITE WITH 2 SOFABEDS
Residence Inn by Marriott Las Vegas Hughes Center
Club de Soleil All-Suite Resort 5625 West Tropicana Avenue
Wyndham Grand Desert 265 East Harmon Avenue
Holiday Inn Club Vacations at Desert Club Resort 3950 Koval Lane
WorldMark Las Vegas Tropicana 5275 West Tropicana Avenue
Tahiti All-Suite Resort 5101 West Tropicana Avenue
Cancun Resort Las Vegas By Diamond Resorts 8335 Las Vegas Boulevard South
The Signature at MGM Grand at 145 E Harmon can be booked directly or rent an owners condo
The Berkley, 8280 Dean Martin Drive
Westgate Flamingo Bay Resort 5625 West Flamingo Road
Hilton Grand Vacations Suites on the Las Vegas Strip 2650 Las Vegas Boulevard South
Polo Towers By Diamond Resorts 3745 South Las Vegas Boulevard,
Marriott's Grand Chateau 75 East Harmon Avenue
Many hotels have 2 bedroom suites, and it is a matter of location, how much you want to spend, and how many people, and whether you want gaming at the hotel.
If you had a large amount of money, there is super-premium