there's plenty of vs there're plenty of

Some examples from the web:

• Yes, there's plenty of room here.
• Well, there's plenty of space.
• Man, there's plenty of shorties out there.
• TV's broken, but there's plenty of reader's digest.
• I slept here once, there's plenty of mosquitoes and the smell...
• No, there's plenty of room.
• And hell, there's plenty of space here.
• No, there's plenty of room.
• It is, there's plenty of space.
• But there's plenty of room here.
• You said there's plenty of oil out there.
• No, Han, there's plenty of sauce.
• You know, there's plenty of fresh fruit here.
• And, of course, there's plenty of... room up top, now that the big boys are on doorstep duty.
• I think you'll find there's plenty of room for everybody.
• You know, there's plenty of space back in your room.
• And there's plenty of blame to throw around, and I accept it.
• Plus there's plenty of stuff he could do here.
• See that there's plenty of wine at table one.
• Well, hell, there's plenty of warmth right here.

Some examples from the web:

• So. I struck out online, but there're plenty of guys here, so don't worry.
• There're plenty of civilians in Indochina.
• There're plenty of seats, and you bother nobody!
• Then when you're finished There's plenty of time for conversation.
• My third comment is about your doubts: plenty of speeches, plenty of documents, plenty of reports, but not enough actual progress towards quantified targets.
• Plenty of money, plenty of friends, plenty of everything.
• Plenty of room for psychopathic killers.
• And there are plenty of slant-eyed girls.
• Alana has plenty of natural pluck and sparkle.
• Plenty of other good fish around.
• Plenty of unemployed university grads these days...
• She had plenty of enemies in the cartels.
• Plenty of people these days looking for a lifeboat.
• Plenty of time to ponder the unponderable.
• There's still plenty of wilderness.
• There's plenty of boozy holidays.
• Plenty of eligible officers to go around.
• There are plenty of interesting cases.
• Plenty of room for football equipment.
• Plenty of fighters come back from that.