Will breaking out the context calls cause multiple trips to the database? - asp.net-mvc

Question

I'm refactoring some previously written MVC and Entity Framework code. The way the initial code was written they called a DAL.GetGroupDetail(int groupId) method. In that method it created a ViewModel and populated several properties. Some of those properties are Lists for things like CostCenters, Cities, Groups. I want to break those calls out into their own methods so that they can be re-used in other controllers.
My question is that doing that I'm creating new Contexts using the Using statement. My understanding is that would create multiple connections to the database and thus would slow down the site if multiple users were using it at the same time?
Example, currently this is the basic code:
public ClockGroupViewModel GetClockGroupDetail(int groupId)
{
GroupViewModel cgdv = new GroupViewModel();
using (var ctx = new VTContext())
{
bio_group group = ctx.bio_group.Where(x => x.group_id == groupId).FirstOrDefault();
cgdv.GroupId = group.group_id;
cgdv.GroupName = group.group_name;
cgdv.Cities = ctx.bio_city.ToList();
var clocks = from c in ctx.bio_clock.Where(x => x.group_id == groupId)
select new ClockViewModel
{
ClockID = c.rdr_id.ToString(),
ClockDescription = c.clock_desc,
};
cgdv.ClockList = clocks.ToList();
cgdv.CostCtrList = (from g in ctx.bio_clock_group
from cgc in ctx.bio_clock_group_costctr
where cgc.group_id == g.group_id && g.group_id == groupId
select cgc.cost_ctr).ToList();
}
This how I'm thinking of changing it:
public ClockGroupViewModel GetClockGroupDetail(int groupId)
{
GroupViewModel cgdv = new GroupViewModel();
using (var ctx = new VTContext())
{
bio_group group = ctx.bio_group.Where(x => x.group_id == groupId).FirstOrDefault();
cgdv.GroupId = group.group_id;
cgdv.GroupName = group.group_name;
cgdv.Cities = GetCityList();
cgdv.ClockList = GetClockGroupClockList(group.group_id);
cgdv.CostCtrList = GetGroupCostCenter(group.group_id);
}
}
public List<bio_clock_city> GetCityList()
{
using (var ctx = new VTContext())
{
return ctx.bio_city.ToList();
}
}
public List<ClockViewModel> GetClockGroupClockList(int groupId)
{
using (var ctx = new VTContext())
{
var data = (from c in ctx.bio_clock.Where(x => x.group_id == groupId)
select new ClockViewModel
{
ClockID = c.rdr_id.ToString(),
ClockDescription = c.clock_desc,
}).ToList();
return data;
}
}
public List<string> GetGroupCostCenter(int groupId)
{
using (var ctx = new VTContext())
{
var data = (from g in ctx.bio_clock_group
from cgc in ctx.bio_clock_group_costctr
where cgc.group_id == g.group_id && g.group_id == groupId
select cgc.cost_ctr).ToList();
return data;
}
}