“I'm open to other suggestions, though.”
You're making plans to have dinner with another couple. You've suggested one restaurant, but you want to be flexible to other suggestions too. After writing your suggestion, you write this.
I'm open to other suggestions, though.
"Though" is similar to "but" and "however". It is usually used at the end of the sentence in spoken English:
I have a pilot's license. I haven't flown in almost 5 years, though.
In written English, it's more appropriate to use it between clauses:
I have a pilot's license, though I haven't flown in almost 5 years.
"However" can be used in the same way:
I do agree with the Prime Minister on defense, however.
"Though" is more casual than "however", though.
When you are "open to" a suggestion, it means that you might consider it. You don't mind thinking about it, and you might be convinced to follow the suggestion.
For example, if you're trying to pick a restaurant to eat at, and a friend asks you whether you like Ethiopian food, you might say:
I don't know. I've never had it. But I'm open to trying it.
You can ask someone whether they're open to a particular idea or suggestion:
Would you be open to the idea of selling your business if someone made a strong offer?
The opposite of "open to" is "not open to":
It seemed like she wasn't open to any other suggestions.
"Suggestions" are ideas that people suggest.
You can ask whether someone has suggestions when you encounter a problem:
A: What are you going to do?
B: I don't know. Do you have any suggestions?
You can also talk about your own suggestions:
I have a few suggestions, if you're interested.